A pulley is a simple machine having a rope that passes over a grooved wheel. A fixed pulley is attached to a solid support and changes the direction of force. Resistance force, the weight of an object being lifted, is attached to one end of a rope going over a fixed pulley. Effort force is exerted on the other end of the rope.

A movable pulley moves along the rope with the resistance force, and the direction of the force is not changed. A pulley system may have a single pulley or a combination of pulleys. Pulleys are used to make work easier.


In this experiment, you will

  • Use a Force Sensor to measure force.
  • Calculate actual mechanical advantage and ideal mechanical advantage.
  • Determine efficiency.
  • Make conclusions about pulley systems.