15. a girl pushes a box that has a mass of 85 kg up an incline. if the giri exerts a force
of 200 n along the incline what is the mechanical advantage of the incline?

M.A = 4.25

Mechanical advantage is the ratio of the force required to do something in comparison to the actual force required using a simple machine.

It is the ratio of output force to the input force.

M.A = Output Force/ Input Force

Out put force 85 Kg = 850 N

Input force = 200 N

Therefore;

M.A = 850 N/200 N

        = 4.25

hey , the answer is c

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.