A ramp with a mechanical advantage of 4 is used to move a 38-newton load. What effort force is needed to push the load up the ramp?
A.9.5 N
B.15.2N
C.3.9 N
D.0.11 N

Explanation:

It is given that,

Mechanical advantage of a ramp is 4

It is used to move a 38 N load

We need to find the force needed to push the load up the ramp. The mechanical advantage is equal to the ratio of output force to the input force. We have output force as 38 N

So,

So, the force of 9.5 N is needed to push the load up the ramp.  

the answer to this is proletariats.

hope this : )