Which simple machine uses a wheel with a rope around it to lift loads by changing the direction of the force?

Which simple machine uses a wheel with a rope around it to lift loads by changing the direction of the force?

• A. Pulley
• B. Wheel and Axle
• C. Wedge
• D. Inclined Plane

Answer: (A)

A pulley is the device that uses a wheel with a rope around it to lift loads by changing the direction of the force. When you pull on the rope, the rope travels over the wheel and redirects the direction of your effort, making it easier to lift the load because you can pull downward or to the side instead of lifting straight up. In simple fixed pulleys, the change in direction is the main effect; in setups with multiple rope segments, the effort needed can be reduced further by sharing the load across more supporting ropes. This directional change is what distinguishes a pulley from the other simple machines listed.

A pulley is the device that uses a wheel with a rope around it to lift loads by changing the direction of the force. When you pull on the rope, the rope travels over the wheel and redirects the direction of your effort, making it easier to lift the load because you can pull downward or to the side instead of lifting straight up. In simple fixed pulleys, the change in direction is the main effect; in setups with multiple rope segments, the effort needed can be reduced further by sharing the load across more supporting ropes. This directional change is what distinguishes a pulley from the other simple machines listed.