https://www.khanacademy.org/science/uk-science-class-7-new/x2afa7396c019dcda:measurement-of-time-and-motion/x2afa7396c019dcda:measuring-time/v/measuring-time 2025-09-18T09:00:50.286015529Z Measuring Time How do we know if an object is moving fast or slow? Is the motion uniform or non-uniform? In this video, we dive into the importance of measuring time to understand motion better. Learn how devices like analog and digital stopwatches help us track time intervals and compare speeds. Through fun examples like a 20-meter race, we explore how distance and time together tell us whether an object is fast, slow, or consistent. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Measuring Time How do we know if an object is moving fast or slow? Is the motion uniform or non-uniform? In this video, we dive into the importance of measuring time to understand motion better. Learn how devices like analog and digital stopwatches help us track time intervals and compare speeds. Through fun examples like a 20-meter race, we explore how distance and time together tell us whether an object is fast, slow, or consistent. https://cdn.kastatic.org/ka-youtube-converted/e_kXwIj8A5I.mp4/e_kXwIj8A5I.mp4 270 Slow and Fast Motion https://www.khanacademy.org/science/tg-grade-9-physical-science-bridge-course/x4c85b5e70c021049:motion/x4c85b5e70c021049:slow-and-fast-motion/v/speed-and-average-speed 2025-09-18T09:00:50.286015529Z Speed and Average Speed In this video, we explore the concept of speed – how fast something is moving – and learn how to calculate it using distance and time. We also dive into average speed, the total distance covered divided by total time taken, even when the speed changes during the journey. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Speed and Average Speed In this video, we explore the concept of speed – how fast something is moving – and learn how to calculate it using distance and time. We also dive into average speed, the total distance covered divided by total time taken, even when the speed changes during the journey. https://cdn.kastatic.org/ka-youtube-converted/Z5mA_l-ptqk.mp4/Z5mA_l-ptqk.mp4 432 Slow and Fast Motion https://www.khanacademy.org/science/tg-grade-9-physical-science-bridge-course/x4c85b5e70c021049:motion/x4c85b5e70c021049:slow-and-fast-motion/v/units-of-speed 2026-02-27T11:40:39.310460683Z Units of Speed In this video, we explore the different units of speed—meters per second (m/s) and kilometers per hour (km/h)—and learn how to convert between them using simple math. We also dive into a real-life example of a car journey to understand how average speed is calculated when the speed isn’t uniform. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Units of Speed In this video, we explore the different units of speed—meters per second (m/s) and kilometers per hour (km/h)—and learn how to convert between them using simple math. We also dive into a real-life example of a car journey to understand how average speed is calculated when the speed isn’t uniform. https://cdn.kastatic.org/ka-youtube-converted/q5PptXscgh0.mp4/q5PptXscgh0.mp4 406 Slow and Fast Motion https://www.khanacademy.org/science/kn-class-7-science/x2edacdad2354c760:motion-and-time/x2edacdad2354c760:speed/e/what-is-speed 2026-04-08T00:36:09.500768563Z What is Speed? Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/uk-science-class-7-new/x2afa7396c019dcda:measurement-of-time-and-motion/x2afa7396c019dcda:measuring-time/e/how-do-we-measure-time 2026-04-08T00:54:09.631945657Z How do we measure time? Lets answer some questions Shankar R exercise