How do simple machines make work easier?

a. they add energy to the work.

b. they increase the force needed to work.

c. they reduce the speed of work.

d. they increase the distance over which a force is applied.

D. They increases the distance over which force is applied.

Explanation:

Work is defined as the quantity which applied force in the direction of motion. According to the Jefferson's Lab there are the following methods which are adopt to make the work easier in performing:

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student

nah.   i'm just sleepy.