Movers want to get a refrigerator up over a 6-inch step. They place a small ramp on the step to make the task easier. Why are the movers using the ramp?

Question

A. The ramp reduces the mechanical force needed to move the refrigerator.
B.The ramp reduces the distance that the refrigerator needs to move. (my answer)
C.The ramp increases the distance that the refrigerator needs to move.
D.The ramp increases the mechanical force needed to move the refrigerator.

Answer 1

A.
actually the distance along the ramp is greater than the vertical height of the step.
(moreover you can use wheels or rollers :)