Question

How does a pulley help lift things?

Answer 1

A pulley helps lift things by changing the direction of the force needed to lift an object. When a rope is threaded through a pulley, it allows the force needed to lift an object to be exerted downwards, rather than upwards. This makes it easier to lift heavy objects since the force needed to lift it is distributed over multiple ropes and pulleys, reducing the amount of force needed to lift the object. Additionally, pulleys can also increase the mechanical advantage of a system, allowing heavier objects to be lifted with less effort.

Answer 2

I just put It helps by changing the directions of the force needed to lift an object.
Is this ok?

Answer 3

Yes, that is correct. A pulley helps lift things by changing the direction of the force needed to lift an object. This change in direction makes it easier to lift heavy objects by distributing the force over multiple ropes and pulleys.

Answer 4

How does a lever help move heavy objects?

Answer 5

A lever helps move heavy objects by using a pivot point, or fulcrum, to multiply the force applied to the object. When a force is applied to one end of the lever, the lever pivots around the fulcrum and the force is magnified on the other end of the lever, allowing heavy objects to be moved with less effort. Levers are able to provide mechanical advantage, which means that they can make it easier to lift or move heavy objects because they allow the input force to be spread over a longer distance, making it possible to move heavy objects with less force.