Data Sheet - Compound Machines

 Weight of mass (N) Height of inclined plane (m) Length of inclined plane (m) Force on inclined plane (N) Force on pulley (N) Force on pulley-plane system (N)

1. What is the theoretical mechanical advantage of the pulley? This is calculated by the number of ropes used to lift the cart.

2. What is the theoretical mechanical advantage of the plane? Divide the length of the plane by the height of the plane.

3. What is the theoretical mechanical advantage of the compound machine (the plane-pulley system)? This is the product of the individual mechanical advantages.

4. What force was required to lift the cart originally (in step one)?

5. What is the experimental mechanical advantage of the plane? Divide the weight of the cart by the force on inclined plane. Compare this to your theoretical advantage calculated above.

6. What is the experimental mechanical advantage of the pulley? Divide the weight of the cart by the force on the pulley. Compare this number to your theoretical advantage calculated above.

7. What is the experimental mechanical advantage of the compound machine? Divide the weight of the cart by the force on the plane-pulley system. Compare this number to your theoretical advantage calculated above.