Question

Neil needed to move a pallet of boxes into a warehouse. The pallet was too heavy for him to lift. He slid a hand trolley with a hydraulic jack in it under the pallet. He pumped the handle up and down several times until the pallet was raised off the floor. Then he used the hand trolley to wheel the pallet into the warehouse. How did the hydraulic jack help Neil do his job?

A. It decreased the force of gravity on the pallet.
B. In increased the force he could use to push the pallet.
C. It decreased the distance over which he had to move the pallet.
D. It increased the force he could use to lift the pallet.

Answer 1

The hydraulic jack increased the force Neil could apply to lift the pallet by transforming a small force into a much larger one. Therefore correct option is D

Step-by-step explanation:

How did the hydraulic jack help Neil do his job? The correct answer is D. It increased the force he could use to lift the pallet. A hydraulic jack consists of an incompressible fluid within a U-tube that has movable pistons on each side. When Neil applied a force by pumping the handle, it increased the force on the larger area side, enabling him to lift the heavy pallet with less effort. This is because a hydraulic system allows a small force applied over a small area to be transformed into a much larger force over a larger area, making it easier to lift heavy loads.