ST4_ForceChangesSpeed

Force Changes Speed[[image:ST4_Clip.png align="right"]]

 * Why?**
 * Newton's Second Law claims that acceleration is directly proportional to net force. So when the force drops down to zero, the speed will continue to grow, but not by as much.
 * Learning Objectives**
 * To perform a video analysis of motion in order to identify changes in velocity.
 * Plan and/or Tasks**
 * Compress a spring-loaded cart against a firm surface.
 * Align a metric ruler along the path the cart will travel when released.
 * Prepare PhotoBooth on your laptop to take a video record of the cart.
 * Study the video frame-by-frame and record the location of the cart as the spring pushes the cart.
 * Analyse the data to determine how the cart's speed increased during the event.