Force and Fan Carts

Explore the laws of motion using a simple fan cart. Use the buttons to select the speed of the fan and the surface, and press Play to begin. You can drag up to three objects onto the fan cart. The speed of the cart is displayed with a speedometer and recorded in a table and a graph.

  Launch Gizmo


  • Determine that a force is needed to cause a change in motion.
  • Understand that friction is a force resisting motion.
  • See that a moving object will continue at constant speed if no forces are acting upon it.
  • Determine that larger forces cause greater changes in motion.
  • Understand the relationship between speed, position, and time.
  • Observe that a constant force gives rise to a constant change in speed.
  • Utilize a bar graph and data table to interpret motion.
  • force, friction, position, speed