Question

Which would increase mechanical advantage? A. increasing the length of a ramp. B. greasing a surface of a ramp. C. rolling a heavier ball down a ramp. D. none of the above

Answer 1

 AS stated in dictionary that he ratio of the force produced by a machine to the force applied to it,
 it is used in assessing the performance of a machine
The one that will increase the mechanical advantage is
Increasing the length of the ramp
so correct option is A 
hope it helps

Answer 2

Answer:

A. increasing the length of a ramp.

Explanation:

in a lever, the mechanical advantage is defined as the ratio between the distances from the pivot to the point of action of the forces,

when force is made on the side that has more distance the force on the other side will be greater, the greater the distance from the pivot to where the person applies the force in relation to the distance between the pivot and the load, then the mechanical advantage It will be bigger.

for that reason if we increase the distance from where the person applies the force then we will have more mechanical advantage.