Question

pulleys and incline planes quick check
how can a simple fixed pulley make a job easier? (1 point)
o by decreasing the work done
o by decreasing the force required to lift the object
o by decreasing the distance that the force needs to be applied
o by changing the direction at which the force needs to be applied

Explanation:

A fixed pulley is a simple machine. The work done \(W = F\times d\) (where \(F\) is force and \(d\) is distance) remains the same for an ideal pulley (neglecting friction etc.). A fixed pulley does not decrease the force (\(F\)) or the distance (\(d\)). But it changes the direction of the force. For example, to lift a load upwards, with a fixed pulley, you can pull the rope downwards.

Answer:

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