To show and then play a movie, click on the arrow or the movie title/description. Repeat to hide it.

UFM L2 Movie 1: Person tries to push cart using a continuous, constant force

UFM L2 Movie 2: Fan pushes cart against force probe, with force-time graph

UFM L2 Movie 3: Fan pushes cart along track, with speed-time and force-time graphs

UFM L2 Movie 4: Motion of fan-cart along three tracks, with time measured for each track