Question

An inclined plane can help _____.

reduce the effort needed to move a load horizontally
reduce the effort needed to move a load vertically
increase the effort needed to move a load vertically
increase the effort needed to move a load horizontally

Answer 1

Reduce the effort needed to move a load vertically. An incline decreases the amount of work you need to put in to lift a load. If you lifted the load directly up, you would need to put in enough energy to counter the whole weight of the load. If you push the load up an incline, however, your horizontal force will only need to counter the x-component of gravity's force, which is smaller in magnitude, so it takes less effort to push the load up a slope. 

Answer 2

Answer;

Reduce the effort needed to move a load vertically

An inclined plane can help reduce the effort needed to move a load vertically.

Explanation;

• An inclined lane is an example of simple machine that reduces human effort to do work. This type of a machine is used to raise objects to higher heights from a low heights with less human effort.
• This machine produces a mechanical advantage to decrease the amount of work or effort that is required to move an object to a particular vertical height.