https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/position_velocity_speed 2024-11-07T15:12:48.053941755Z Position, velocity, and speed An object's position specifies how far the object is from a reference point, and in what direction. The rate that an object's position changes is called velocity. Average velocity is calculated as change in position divided by change in time. Position and velocity are vector quantities. Average speed is calculated as distance travelled divided by time. Speed and distance are scalar quantities with no direction. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/b42f4e45-f832-4988-bcea-732d1348b410_1280_720_base.png Position, velocity, and speed An object's position specifies how far the object is from a reference point, and in what direction. The rate that an object's position changes is called velocity. Average velocity is calculated as change in position divided by change in time. Position and velocity are vector quantities. Average speed is calculated as distance travelled divided by time. Speed and distance are scalar quantities with no direction. https://cdn.kastatic.org/ka-youtube-converted/vOipqtdR23s.mp4/vOipqtdR23s.mp4 624 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/speed-and-velocity 2025-07-01T10:10:08.145512912Z Speed and velocity An object's average speed is the distance it travels, divided by the time taken to travel that distance. An object's motion can be analyzed by recording distance and time data in a table or graph. The slope of a distance vs. time graph is the object's speed. Velocity is speed with direction of motion included. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/09bde913-3d37-440e-a2b1-21655e4f6dca_1280_720_base.png Speed and velocity An object's average speed is the distance it travels, divided by the time taken to travel that distance. An object's motion can be analyzed by recording distance and time data in a table or graph. The slope of a distance vs. time graph is the object's speed. Velocity is speed with direction of motion included. https://cdn.kastatic.org/ka-youtube-converted/W6Ar0ls6tVA.mp4/W6Ar0ls6tVA.mp4 471 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/a/describing-motion 2026-04-30T07:30:36.209464894Z Learn and try: Describing motion Learn how to describe where an object is located and how it's moving. Analyze motion data using tables and graphs. Explore why reference frames and units are important when describing motion. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/e/visual-representations-of-motion 2026-03-11T22:10:40.652316431Z Visual representations of motion Check your understanding of visual representations of motion in this set of free practice questions. Molly exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/e/speed-and-velocity 2026-04-07T22:23:57.656416987Z Speed and Velocity LO: Speed and velocity Revathi exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/average-speed-for-the-entire-journey-ur 2025-08-08T00:24:37.843818748Z Average speed for the entire journey Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Average speed for the entire journey Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/C8y9qAAB7Bs.mp4/C8y9qAAB7Bs.mp4 882 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/e/average-velocity-and-speed 2026-05-11T04:40:42.021307954Z Average velocity and speed Let's solve some questions! vibhor exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/calculating-average-velocity-or-speed 2021-03-04T17:23:32Z Calculating average velocity or speed Although speed and velocity are often words used interchangeably, in physics, they are distinct concepts. Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt. Sal Khan video https://cdn.kastatic.org/googleusercontent/CmHtPHEwXnF8wDsUgu4Eim-belRc6BR7htZFCndG6rNjvxdC7npZpmRBIaBi0qduRNPCTgjYw2E27oKQ-qJ_t24 Calculating average velocity or speed Although speed and velocity are often words used interchangeably, in physics, they are distinct concepts. Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt. https://cdn.kastatic.org/ka-youtube-converted/oRKxmXwLvUU.mp4/oRKxmXwLvUU.mp4 705 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/displacement-from-time-and-velocity-example 2023-08-17T23:33:36.770424498Z Displacement from time and velocity example Worked example of calculating displacement from time and velocity. Learn how velocity, time, and direction factor into calculating displacement. Understand the importance of unit conversion in these calculations. Sal Khan video https://cdn.kastatic.org/googleusercontent/1IhYgROo1B-C1QF0l-hg3leRvaTNHJbS-tlCWdmZ9fPLfwQ9ZYRMw3eecYKZDNUbDLPSCMQaeY3G44Lo9l4NCzY Displacement from time and velocity example Worked example of calculating displacement from time and velocity. Learn how velocity, time, and direction factor into calculating displacement. Understand the importance of unit conversion in these calculations. https://cdn.kastatic.org/ka-youtube-converted/lQ-dvt3V4yQ.mp4/lQ-dvt3V4yQ.mp4 300 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/e/speed-and-velocity-questions 2026-04-08T00:36:09.500768563Z Speed and velocity questions Speed and velocity questions Sze Yan exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/v/instantaneous-speed-and-velocity 2022-11-16T04:22:43.7414897Z Instantaneous speed and velocity Instantaneous speed is a measurement of how fast an object is moving at that particular moment. Instantaneous velocity is a vector quantity that includes both the speed and the direction in which the object is moving. Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic formulas if the object’s acceleration is constant. David SantoPietro video https://cdn.kastatic.org/googleusercontent/FhLCZfA8g2adKxxacA__pdTAeJ_PD8gzSJMTMCIvwlZqwM6oBJ44hUwDFPz_ljBnyARk9Hc36nrZfm2V_rXRRhWi Instantaneous speed and velocity Instantaneous speed is a measurement of how fast an object is moving at that particular moment. Instantaneous velocity is a vector quantity that includes both the speed and the direction in which the object is moving. Learn how to find an object’s instantaneous speed or velocity in three ways - by using calculus, by looking at the slope of a given point on a graph of an object’s rate vs. time, or by using kinematic formulas if the object’s acceleration is constant. https://cdn.kastatic.org/ka-youtube-converted/pfTTHx9kCHk.mp4/pfTTHx9kCHk.mp4 278 Speed and Velocity https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:speed-and-velocity/e/understanding-velocity-and-speed 2022-09-02T10:08:12.365878162Z Understanding velocity and speed Let's solve some problems to test our understanding of the meaning of velocity and speed in Physics - both average and instantaneous. Aakash Bagga exercise