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

UCF L2 Movie 1: Two equally strong fans push on stationary cart in opposite directions

UCF L2 Movie 2: Two equally strong fans push on moving cart in opposite directions

UCF L2 Movie 3: Compares scenario in Movie 2 to same scenario with fans turned off

UCF L2 Movie 4: Simulation: Balancing more than two forces