A student pushes a crate across a level floor by exerting a force of directed below…
PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy
Problem
A student pushes a crate 2m across a level floor by exerting a force of 35N directed 30∘ below the horizontal. Describe the sign (positive, negative, or zero) of the work done by (i) the normal force exerted by the floor and (ii) Earth’s gravitational force on the crate during this displacement, and justify your answer.