Final answer:
The statement regarding carrying a forklift load low increasing the effects of jolts from rough terrain is false; a low load decreases these effects. A trailer bouncing slowly on the highway indicates a heavy load due to compressed suspension. The notion that a boy needs to exert exactly 100 N to push a 300 N box up a ramp is also false, due to mechanical advantage.
Step-by-step explanation:
The statement is FALSE. Carrying a forklift load low actually decreases the effects of jolts from rough terrain. By keeping the load low, it lowers the center of gravity which enhances stability and reduces the likelihood of tipping or sway caused by jolts. Regarding the trailer on the highway, if you notice it bouncing up and down slowly, it is more likely that the trailer is heavily loaded. A heavy load would compress the trailer's suspension system, which in turn damps the bouncing more slowly than if the trailer were empty because of the additional mass.
The question about the boy pushing a box is a physics problem involving force, work, and mechanical advantage provided by an inclined plane. The boy's statement is False; the actual force he exerted would be less than 300 N because the ramp reduces the required force over the distance, spreading the effort.