Question

How can a simple fixed pulley make a job easier?
Responses

by decreasing the work done

by decreasing the force required to lift the object

by decreasing the distance that the force needs to be applied

by changing the direction at which the force needs to be applied

Answer 1

A pulley system has a mechanical advantage of 3, and an object weighing 9 Newtons must be lifted 15 meters. How much force must be applied to lift the object?
Use the following equation to find the answer:

MA=Fo/Fi

Responses

1.7 N

0.3 N

3 N

27 N

Answer 2

A simple fixed pulley makes a job easier primarily **by changing the direction at which the force needs to be applied**.

In a fixed pulley system, the pulley allows you to pull down on the rope to lift an object upwards. This change in direction can make it easier to lift heavy objects, as you can use your body weight to assist in the lifting process. However, the mechanical advantage from a simple fixed pulley doesn't reduce the amount of work done, as work is defined as force times distance (the same work is done whether you pull down or lift up).

So, the correct response is primarily about changing the direction of the applied force.