https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/v/falling_objects 2024-07-01T11:54:52.194339821Z Falling objects If two objects are dropped from the same height in a vacuum, they accelerate at the same rate and hit the ground at the same time. This happens because an object's gravitational mass is equal to its inertial mass. As a result, any object in free fall near Earth's surface accelerates at 9.81 m/s/s. The gravitational force acting on an object is not always equal to its weight. A free falling object experiences a gravitational force, but also appears weightless because there is no normal force pushing up on it. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/0bd1ac14-c51e-4071-9ff6-169a419b63d5_1280_720_base.png Falling objects If two objects are dropped from the same height in a vacuum, they accelerate at the same rate and hit the ground at the same time. This happens because an object's gravitational mass is equal to its inertial mass. As a result, any object in free fall near Earth's surface accelerates at 9.81 m/s/s. The gravitational force acting on an object is not always equal to its weight. A free falling object experiences a gravitational force, but also appears weightless because there is no normal force pushing up on it. https://cdn.kastatic.org/ka-youtube-converted/wf8SYTb4r-g.mp4/wf8SYTb4r-g.mp4 700 Free Fall Acceleration https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/v/would-a-brick-or-feather-fall-faster 2021-02-07T17:14:01Z Would a brick or feather fall faster? What would fall faster on the moon, a brick or a feather? Sal Khan video https://cdn.kastatic.org/googleusercontent/tX9aToUIQOXWBaC-QDOOtq2XlnsUKN6FT_hs0_ZAJ_kVHdTqZhknlguHB4CEuGQZWYLHvNIZ_VjNjdewhBGUp8Lc Would a brick or feather fall faster? What would fall faster on the moon, a brick or a feather? https://cdn.kastatic.org/ka-youtube-converted/36Rym2q4H94.mp4/36Rym2q4H94.mp4 635 Free Fall Acceleration https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/v/free-fall-1-body-solved-example 2025-12-18T02:00:41.510401167Z Free fall 1 body - solved example Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Free fall 1 body - solved example Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/g7fY6FS2cfA.mp4/g7fY6FS2cfA.mp4 637 Free Fall Acceleration https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/v/free-fall-2-body-solved-numerical-pk 2025-12-18T02:00:41.510401167Z Free fall - 2 body solved numerical Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Free fall - 2 body solved numerical Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/6k6FLTJghtc.mp4/6k6FLTJghtc.mp4 672 Free Fall Acceleration https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/a/free-fall 2026-05-01T14:10:52.97313295Z Learn and try: Free fall Learn what it means for an object to be in free fall. Describe free fall motion using visual and mathematical models. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/e/freefall-exercises-ap1-numerical 2025-11-10T17:40:46.606305245Z Free fall calculations Practice calculating velocity, displacement, and time from word problems when an object is in freefall. April Russell exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/e/understand-falling-objects 2026-03-06T02:00:48.859942267Z Understand: falling objects Check your understanding of falling objects in this set of free practice questions. Emily Cizmas exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinematics/x0e04e0cb682fb793:free-fall-acceleration/v/could-a-coin-dropped-from-a-tall-building-kill-you-pk 2025-12-18T02:00:41.510401167Z Could a coin dropped from a tall building kill you? Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Could a coin dropped from a tall building kill you? Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/Jm4X0jAh7yU.mp4/Jm4X0jAh7yU.mp4 205 Free Fall Acceleration