Time of flight of projectile formula. Aug 11, 2021 · Time of Flight, Trajectory, and Range.

t = V0 g. 87 seconds. Δ y = ( v y + v 0 y 2) t. The unit for the time of flight is seconds ( s ). 8 m/s². Launch velocity. This information can then be used to measure velocity or path length, or as a way to learn about the particle or medium's properties (such as composition or flow rate). Thus, we set the displacement in y equal to zero and find Projectile motion: A kind of motion that is experienced by an object when it is projected near the Earth's surface and it moves along a curved path under the action of gravitational force. 12 mins. Nov 28, 2018 · The formula below is the time of flight ( time of whole journey from launch(0,0) to landing (×,y) ) of a projectile whose initial vertical position is above the point of impact. t = 32 * 0. Projectile motion and time of flight Time of flight. Assume it's 16 ft/s. The linear equation of motion is: v = u + at. 4 m below the straight-line, gravity-free path. 8 m/s2. 8 mins. The motion of falling objects, as covered in Chapter 2. Angle ╬ = 35┬ . The time for projectile motion is completely determined by the vertical motion. t = √ (2 * h / g) t = √(2 ∗ h/g) Where t is time (s) h is the You would have to create a system of equations: v0 sin (theta) - 9. Horizontal Acceleration = 0. T = 2uSin(θ-α) g Cosα. Replace both in the following formula: h_max = h₀ + (v₀)²/ 2g where g is the acceleration due to gravity, g ~ 9. The time of flight of a projection is the time from when the object is projected to the time it reaches the ground. 9 2. The projectile still falls 4. It is calculated by setting y = 0 (y = 0 at point C) and solve for t y = V0 sin (θ) t - (1/2) g t2 = 0 Factor t out in the above equation t (V0 sin (θ) - (1/2) g t) = 0 Two solutions: t = 0 (correspond to point A) and t = 2 V0 sin (θ Oct 2, 2023 · These equations help us determine various parameters, such as the range, maximum height, time of flight, and velocity at any point in the trajectory. Type in the velocity value. y0 — Initial height. Hence, the horizontal range given by a projectile motion is given by R: Horizontal range (R)= u22 θ / g. Formula for the . Starting from the equation relating velocity and position for a uniformly accelerated motion: v^2 =v_0^2 – 2gy v2 = v02–2gy. 3. 6 m, 44. For horizontal projectile motion, V0y = 0. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile Mar 13, 2018 · Use the formula (0 - V) / -32. 8t = 0 (In this equation t is the time to max height). 573/9. The sum of these two times is equal to ( T = time of flight of the projectile) A projectile has a time of flight T and range R. G ravity. The point O is called the point of projection; θ is the angle of projection and OB is the horizontal Range or Simply Range. where: Δx (delta x) is the horizontal displacement (distance traveled) in meters (m) Vx₀ (V x naught) is the initial horizontal velocity in meters per second (m/s) t is the time of flight in seconds (s) Time of flight ( ToF) is the measurement of the time taken by an object, particle or wave (be it acoustic, electromagnetic, etc. Range can be calculated using the formula: Time of Flight Jul 18, 2023 · The following equations are used by the calculator above to determine the time of flight and distance of an object in horizontal projectile motion. The question tells us that the projectile’s initial May 26, 2019 · I think that you misunderstood it that it is the sum of the time spent by the projectile in air and on ground after its impact with the ground but it is defined as follows:- The total time of flight is the time spent by the projectile in air. For an object launched with an initial velocity (u), at an angle (θ) to the horizontal, in the absence of air resistance, the formula is given by: 2sin t = g 2 u s i n (θ) Where: u is the initial velocity, θ is the launch angle, Feb 26, 2024 · This method involves applying the fundamental kinematics equations to compute projectile motion parameters such as the trajectory, time of flight, and maximum height. Where: V_o = Intail Velocity. Substituting this back into our expression for the time of flight of the projectile, we get 𝑇 equals two 𝑉 sin 𝜃 divided by 𝑔. If g = 10 m s − 2 the angle of projection is 45 o. ma = − Cd⋅ρAu2 2. I am trying to understand how the right side of the equation is derived. v 0 = m/s = ft/s, launch angle. θ is the angle of projection. Two ways to find the time of flight 1) T = 200 / V 0 cos (θ) (range divided by the horizontal component of the velocity) 2) T = 2 V 0 sin (θ) / g (formula found in projectile equations ) equate the two expressions 200 / V 0 cos (θ) = 2 V 0 sin (θ) / g which gives 2 V 02 cos (θ)sin (θ Apr 22, 2024 · Become familiar with the projectile motion equations; Gain an intuitive understanding of how initial velocity, projectile range, time of flight, and launch angle are related; and; Demonstrate best practices in lab safety. Mar 16, 2024 · The fundamental formula used by the Horizontal Projectile Calculator is: Δx = Vx₀ * t. Since the vertical acceleration is constant, we can solve for a vertical variable with one of the four kinematic formulas which are shown below. The total time t for which the projectile remains in the air is called the time of flight. The time of flight depends on the initial velocity of the object and the angle of the projection, θθ. For a projectile projected from ground at an angle θ with horizontal, g T 2 = 2 R √ 3, where T is time of fight, R is horizontal range of projectile, g is acceleration due to gravity. All that’s left to do is for us to substitute our values of 𝑉, 𝜃, and 𝑔 into this equation to calculate the time of flight of the projectile. s. io/l/vG7hf55eClass 7 SCIENCE ALL CHAPTERS PDF https:// It's time of flight is. 81 = 0. 22 is called free fall , which describes the motion of an object falling in a gravitational field, such as near the surface The time of flight is the time taken for the projectile to go from point A to point C (see figure above). Enter the angle – for example, 20°. 3. 13 mins. where: ttotal — Time of flight; V0y — Initial vertical velocity; g — Gravity acceleration; and. Horizontal and vertical components of the initial velocity: Jul 18, 2022 · The common formula for calculating a horizontal range is: Horizontal range. We can solve for the time of flight of a projectile that is both launched and impacts on a flat horizontal surface by performing some manipulations of the kinematic equations. 21 / 9. May 7, 2023 · Time of Flight Projectile Motion Calculator: The time of flight of the projectile can be determined by using the calculator developed by us, by simply entering the velocity art which the object is thrown, and the value of angle which the object makes with the ground. The time it takes from an object to be projected and land is called the time of flight. 9 2 = 1. Use that to compute the range. g is the acceleration due to gravity. Formula: The formula for calculating the time of flight (t) is derived from the kinematic equations of motion. Find the time of flight of the projectile. Here we would establish the time of flight and range along the inclined plane. For the vertical downward movement of the body we use this equation: s y = u y + (½) g t 2 => h = 0 + (½) g T 2 Time of flight of a horizontal projectile = T = √(2h/g Jul 9, 2024 · Prove that the time of flight 'T' and horizontal range 'R' of a projectile motion are connected by the equation \\[g{T^2} = 2Rtan\\theta \\]. Time of Flight, Trajectory, and Range. 5•a x •t 2) listed among the horizontal kinematic equations is suitable for Aug 6, 2022 · The formula for the time of flight of a projectile is: \scriptsize t_\text {total} = \frac {V_ {0y} + \sqrt {V_ {0y}^2 + 2\text {g}y_0}} {\text {g}} ttotal = gV 0y + V 0y2 +2gy0. As an object in projectile motion, the time of flight is only determined based on the initial height and the force of gravity. Then, we take the square root to get the time of flight of the projectile (to two decimal places): 𝑇 = √ 1. Apply the above equation for projectile motion, the equation will Apr 19, 2024 · To calculate the time of flight in horizontal projectile motion, proceed as follows: Find out the vertical height h from where the projectile is thrown. The first equation (x = v ix •t + 0. The time to maximum altitude varies linearly with the launch velocity. T – ½ gT². Sep 12, 2022 · Time of Flight, Trajectory, and Range. 1) T = 200 / V 0 cos (θ) (range divided by the horizontal component of the velocity) 2) T = 2 V 0 sin (θ) / g (formula found in projectile equations ) equate the two expressions. Example Calculations. Problems on Projectile Motion - II. 3 m / s 14. = ⁡ After the flight, the projectile returns to the horizontal axis (x-axis), so =. The object is called a projectile, and its path is called its trajectory. Range of the Projectile The time of flight of a projectile on an upward inclined plane depends upon. Since it is only subject to gravity, the projectile cannot be in contact with any surface. The total time taken by the particle from reaching O to B is called the time of flight. 6 × 2 1 0 = 1. t = time of flight ( s) Apr 10, 2024 · Time of Flight, Trajectory, and Range. Ans: Hint: Consider the projectile motion to be the sum of two rectilinear motion in x-axis and y-axis. Hence, horizontal distance, Jun 21, 2024 · The horizontal equations are a little easier, since the only net force acting on the ball is the drag: Fnet = ma = −D. 3 m / s and lands 20. Mar 17, 2020 · Time taken by a projectile to cover entire trajectory is called the time of flight. 2. The flight of a projectile depends on three variables in order to model its flight through space: the gravity on Earth, the starting height of the projectile, and the amount of vertical force given to launch the projectile. Mar 31, 2021 · This lecture is about time of flight in projectile motion and how to find time of flight in projectile motion. An interesting application of Equation 3. Jan 9, 2019 · The range of a projectile motion is the total distance travelled horizontally. 3 days ago · The horizontal range is the distance that the projectile covers in the horizontal direction. Some of the important parameters and formulas are the range of the projectile formula, maximum height formula, acceleration, velocity and displacement formula, time of flight formula and the initial velocity formula. Thus, we set the displacement in y equal to zero and find Time of flight. These equations allow us to calculate various aspects of projectile motion, making it a valuable tool for understanding and predicting the behavior of objects in motion under gravity. The horizontal speed of a projectile close projectile An object flying through space unaided by an engine, The formula for time gives the time of flight of the projectile. Example 1. where u is the horizontal velocity. 21 × 0. Please note, that it is easiest to complete this experiment with a partner, although this is not strictly necessary. Now let’s explore projectile motion on inclined plane, wherein, a projectile is thrown at an angle from the inclined surface. 2 ft/s^2 = T where V is the initial vertical velocity found in step 2. Plugging this time into the altitude equation we obtain: y = V0 ⋅ ( V0 g) − g 2 ⋅ ( V0 g)2. Jul 3, 2024 · To find the maximum height of a ball thrown up, follow these steps: Write down the initial velocity of the ball, v₀. The vector initial velocity has two components: V0x and V0y given by: V0x = V0 cos (θ) V0y = V0 sin (θ) The vector acceleration A has two components A x and A y given by: (acceleration along the y axis only) Ax = 0 and Ay = - g = - 9. 998 seconds. Maximum height. In this formula, 0 represents the vertical velocity of the projectile at its peak and -32. Time of Flight:-Let t be the time taken by the particle to go from A to B. The time period the projectile is in the air depends on the initial velocity and the angle of projection. Jul 11, 2024 · One of these examples is that of a projectile: an object that is subject only to the force of gravity. Thus, we set the displacement in y equal to zero and find Time of flight or total time of the whole journey. T = \[\frac{2usin\theta }{g}\] Acceleration, a The above diagram represents the motion of an object under the influence of gravity. Hanna Pamuła, PhD. . The time for this effect to take place is the length of time of the flight of the The amount of time it spends in the air is called the time of flight. Nov 30, 2017 · We will cover here Projectile MotionDerivation to derive a couple of equations or formulas like: 1> derivation of the projectile path equation (or trajectory equation derivation for a projectile) 2> Derivation of the formula for time to reach the maximum height. 1 u2 du = − g V2t dt. If the ground from which the projectile is launched is level, the time of flight only depends on the initial velocity v0, the launch angle θ, and the acceleration due to gravity. 81 × (0. - Horizontal velocity (Vx) = V x cos (α) - Vertical velocity (Vy) = V x sin (α) - Three vectors (V, Vx, and Vy) = a right triangle. Also, the trajectory has vertical (y) and horizontal (x) position components. Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The formula used to calculate the time of flight of a projectile is therefore dependent on the direction and speed of the projectile. The time of flight of projectile is 10 second and its range is 500m. App 4 days ago · Time of Flight of Projectile Formula. Solution 1. Time of flight Jul 2, 2021 · Time of flight of a projectile launched horizontally. Jul 23, 2019 · Find the relevant formula with examples for better understanding. Earth's gravity is different than the gravity on other planets. If the vertical velocity is zero, then you have horizontal projectile motion. Time of Flight. Have a look at the flight path of the object with this trajectory calculator. 8 = 18. . Vertical Velocity = Vy -g*t. May 18, 2023 · A body is projected with an initial velocity of 16 m/s at 35┬ to the horizontal plane. V o is the initial velocity; sin θ is the component along the y-axis; cos θ is the component along the x-axis; The formula of projectile motion is used to calculate the velocity, distance and time observed in the projectile motion of the object. Time of Flight, T: The time of flight of a projectile motion is exactly what it sounds like. They are different from each other in both the conditions, in elevated projectile motion and horizontal projectile motion. The total time duration in which the particle remains in the air is called the time of flight. The calculator uses the following steps to work out the remaining parameters for you. t is the time taken; Equations related to the projectile motion is given as. If the object is thrown Projectile Equations used in the Calculator and Solver. If you choose angle = 0°, it would be the example of horizontal projectile motion. ) to travel a distance through a medium. R = u θ × 2u × sinθ / g. Jan 28, 2024 · Find the time of flight and impact velocity of a projectile that lands at a different height from that of launch. As per the time of flight formula, initial velocity, theta, and acceleration of gravity(g) are required to do calculations. When the projectile reaches a vertical velocity of zero, this is the maximum height of the projectile and then gravity will take over and accelerate the object downward. 5. In this case, kinematic equations give useful expressions for these quantities, which are derived in the following sections. This calculator developed by us gives accurate results in a fraction of seconds. Two ways to find the time of flight. 3 m/s and lands 20. It is given as . y = m = ft, The two calculated times are. In other words, The time of flight is the 🌟 Enhance Your Understanding with Our Free Slide Download! 🌟Did you love this video? Dive deeper by downloading the slides used in our lesson—for FREE!Why Jun 17, 2019 · Time of Flight, T: The time of flight of a projectile motion is exactly what it sounds like. 200 / V 0 cos (θ) = 2 V 0 sin (θ) / g. Now we can calculate the range of the projectile, knowing that its horizontal velocity remains constant throughout the motion. g = Gravitational Force. May 28, 2024 · Calculate the time required to reach the maximum height: it corresponds to the time at which vᵧ = 0, and it is equal to t = vᵧ/g = 3. The horizontal range of a projectile is the distance it travels horizontally while in motion. θ = degrees, and trajectory height. General projectile motion. S = ut + 1/2(at 2) v 2 = u 2 + 2aS. Acceleration. A football is thrown at a speed of 30 m/s in a direction \ (30^ {\circ }\) above the horizontal. 8)t^2 + 2*v0*t sin (theta) = 0 (In this equation t is also the time to max height) Note: These equations come straight from the kinematic equations and 2*t is only the total time in the air if the projectile lands at Solution to Problem 5: a) Let T be the time of flight. At time t, the velocity has two components 19 mins. It is the time from when the object is projected to the time it reaches the surface. 1 m, and 78. 9 m, 19. α = Angle of Projection. 2 through Equation 3. Jul 9, 2020 · Projectile Formula. We can use the terminal velocity to simplify this equation: a = dudt = −gu2 V2t. May 7, 2023 · Projectile Motion Formula Solved Examples. It is the total time taken by the projectile when it is projected from a point and reaches the same horizontal plane or the time for which the projectile remains in the air above the horizontal plane. Differential equations of motion can be used to discover various projectile motion parameters. When a projectile lands at a different height from that of launch, the time of flight and impact velocity can Solution to Problem 5: a) Let T be the time of flight. In this time the displacement of the projectile to the plane is zero. May 2, 2023 · Time of Flight. These are the same calculations that the "regular" formulas come from, except that the "up" and "down" parts are not equal. 327)² /2 = 0. 5 * G * T². Time of Flight Formula: The formula for the time of flight initial velocity and angle of the projection of flight:The time of flight equation is given by: $$ t = \dfrac {V_o sin (α) + \sqrt { (V_o sin (α))^2 + 2gh}} {g} $$. So any projectile that has an initial vertical velocity of 14. The range of the projectile, like the time of flight and maximum height, is determined by the initial speed. The equation of trajectory is given as y = xtanθ − gx2 2u2cos2θ. = Horizontal component of velocity × (Total flight time) which gives OA = ux / t. The range of a projectile depends on its initial velocity denoted as u and launch angle theta (). The below given is the time of flight projectile motion formula to calculate the time of flight projectile motion on your own. Projectile Motion Playlist: https://www. Gravity only affects the vertical component of the projectile's travel. Time of flight. Calculate. Step into our Time of Flight Calculator, a powerful tool for swiftly computing the time it takes for a projectile or object to travel a certain distance under specified conditions, aiding in various physics and engineering analyses. Let the time taken to complete the trajectory = T. Two-dimensional projectiles experience a constant downward acceleration due to gravity a y = − 9. If T is the total time of flight, h is the maximum height & R is the range for horizontal motion, the x and y co-ordinates of projectile motion and time t are related as: Q. Vertical Acceleration = -g since only gravity acts on the projectile. Given that, Initial velocity V o = 16 m/s. 8. 0 = v 0 Sinθ . For example, if your initial vertical velocity was 32. Dec 18, 2023 · Time of Flight: The time it takes for the projectile to reach the ground (when y = 0) can be determined using the vertical motion equation: 0 = y₀ + v₀y * t – (1/2) * g * t²This is a quadratic equation in t, and you can solve for t using the quadratic formula. 2 (-9. Substitute the values in the equation: y = 3. This depends on the initial velocity of the projectile and the angle of projection. Let T be the time of flight. It is an example of projectile motion (a special case of motion in a plane). Initial speed u = v 0 Sinθ. Range:-During time of flight, the horizontal velocity u cos α remains constant. Horizontal Range of flight for a projectile motion up an inclined plane: In the case of a projectile, the range is the maximum distance from the shooter to the target. 5*g*t^2. The motion of a projectile is considered as a result: Few Examples of Two – Dimensional Projectiles. There are two values of time for which a projectile is at the same height. 96 s in the air. ∴ 0 = v 0 Sinθ – ½ gT. It is denoted by T. Jul 17, 2022 · θ is the angle of projection. a = − Cd⋅ρAu2 2m. Aug 11, 2021 · Time of Flight, Trajectory, and Range. Range of a Projectile is nothing but the horizontal distance covered during the flight time. 327 s. 525 m. A) The maximum range is 4 times the maximum height attained during its flight in the case of a projectile. The diagram below depicts the position of a projectile launched at an angle to the horizontal. The angle of projection (θ) is The time for projectile motion is completely determined by the vertical motion. Therefore: Aug 6, 2022 · The formula to calculate the time of fight is: ttotal = [V0y + √ (V0y² + 2gy0)]/g. Let’s consider an example where a projectile is launched at an initial velocity of 20 m/s at an angle of 30 degrees above the horizontal. v y = v 0 y + a y t. We note the position and displacement in y must be zero at launch and at impact on an even surface. Vertical projectile motion: formula for maximum height. Complex Problem Based on Projectile Motion-I. During the total flight time, the projectile continues moving at the same horizontal velocity. The projectile still falls below its gravity-free path by a vertical distance of 0. From the velocity equation we can determine the time at which this happens: V = 0. 0 Comments. Take the square root of the result from step 2, and you will get the time of flight in horizontal projectile motion. Throwing a ball or a cannonball. Horizontal Velocity = Vx. Initial Velocity (m/s): Launch Angle (degrees): Gravitational Acceleration (m/s²): ADVERTISEMENT. Radius of Curvature of Projectile Motion. Trajectory Formula. The trajectory formula helps us to find the gravity that acted on an object. Vikas Sir (Vikas Meel - IIT Delhi) July 2, 2021. It can be also calculated by the initial velocity in the y-direction and the gravitational force. The time of flight is equal to two times the time of maximum height. Calculate the trajectory of a projectile. Q. So, the time of flight is 1. We have, s = ut + ½ at². Here’s an example: Jan 20, 2020 · The total flight time is the time going up plus the time going down. ∴ ½ Jul 2, 2021 · Projectile Motion Along an Incline. Making v=0 v = 0, results in the maximum height y_ {max} ymax, given by: 0 =v_0^2 – 2gy_ {max} 0 = v02–2gymax. The time taken by the ball to return to the same level. 14 ft/s, it would take 0. 📐 The vertical position formula for projectile motion is used to derive the time-of-flight: Y = V₀T * sin(θ) - 0. The maximum height reached by will be (g=10m/s2) 5 days ago · At the highest point in the flight, the vertical velocity is zero. Maximum Height (H): Formula: H = v_0^2 * sin^2(θ) / (2 * g) Where: v_0 is the initial velocity. These distances are indicated on the diagram below. Write down the initial height, h₀. where: — Initial height, in meters ( m ). A surprising number of common physical scenarios can be closely modeled with this premise. Multiply h by 2 and divide the result by g, the acceleration due to gravity. Hence, 0 = u sin (α-β) t - ½g β t 2 => t = 2u sin(α-β)/gcosβ. 0 m below its starting altitude will spend 3. 1. Of interest are the time of flight, trajectory, and range for a projectile launched on a flat horizontal surface and impacting on the same surface. Calculate your velocity components. as the projectile is reaching the same level of projection vertical displacement y = 0. If we don't know the vertical component of the initial velocity ( V0y ), we can calculate it using the total initial Solving for the horizontal distance in terms of the height y is useful for calculating ranges in situations where the launch point is not at the same level as the landing point. Also note that range is maximum when = 45° as sin(2) = sin (90) = 1. 5•a x •t 2) listed among the horizontal kinematic equations is suitable for The total time of flight of the football is 3. 6 Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of All MCQ of New NCERT 2024FOR ALL CHAPTERS SCIENCE MCQ PDFClass 6 SCIENCE ALL CHAPTERS PDF https://rzp. The time of flight is the time period from when the object is launched to the time it reaches the ground. 3> Total time of flight – formula derivation. The time of flight, horizontal range, and maximum height reached by the projectile depends on the initial velocity and the angle of the projectile. A projectile is always in non-propelled flight, or free-fall. Nov 4, 2015 · via YouTube Capture Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. 336/9. This is an extension First, we rearrange for 𝑇 : 𝑇 = 9. Desktop. 327 - 9. The total time of flight of the football is 3. Where. Problems on Projectile Motion - I. Projectile motion is a form of motion in which an object or particle (called a projectile) is thrown with some initial velocity near the earth’s surface, and it moves along a curved path under the action of gravity alone. With the time determined, information in the table and the horizontal kinematic equations can be used to determine the horizontal displacement (x) of the projectile. Time of flight is t = 2 * 16 * sin (35┬ )/9. So Sal does the calculations to determine the effects of gravity on the vertical component, which will be to slow the vertical climb to zero then accelerate the projectile back to earth. The motion of a billiard ball on the billiard table. Sep 4, 2019 · 📌 The time-of-flight refers to the duration a projectile takes to reach the ground after being fired from the ground level. youtube Jul 3, 2024 · Let's use this time of flight calculator to find out how long it takes for a pebble thrown from the edge of the Grand Canyon to hit the ground. Therefore, the time-of-flight formula (t) is given by: $\text{Total Time of Flight (t)=}\dfrac{2u\text{ sin}\theta }{g}$ Horizontal Range. Oct 24, 2010 · The time of flight of a projectile lanched 7 m/s at a 40 degree angle from a height of 21 m is calculated using the quadratic formula. 61 seconds. 8 m s 2 . Chapter Wise Approach. The principle is governed by Newton’s laws of motion, considering the velocity decomposition into horizontal and vertical components, and the effect of gravity. 4> Maximum height of a projectile Aug 29, 2022 · This equation is derived from the time of flight equation, where the time to reach the peak is half the total time of flight. Apr 10, 2023 · Velocity of Projection Formula. \(\text {Time of Flight (T)} = 2t= {2u sin\theta \over {g}}\) Check Power in AC Circuit for details here. Moreover, if we launch the projectile with an initial velocity \(v_{0}\), at an angle \(\theta\) from the horizontal plane. 10 mins. 3 8. B) In the case of a projectile the range R is related to the time of flight T as R = 5 T 2. 2 ft/s^2 represents the acceleration due to gravity. It is the total time for which the projectile remains in flight (from O to A). Range of Projectile Formula. 3 days ago · Time of flight, T. The range may be 6 days ago · The time of flight refers to the amount of time it takes a particle to travel from point A to point B. lq ri zs iy da tc pp sz ol pv