If you lift a 15-N weight vertically 30 m above the ground, you are
A) doing work against gravity.
B) doing work against friction.
C) doing work against inertia.
D) doing none of these.

Question

Quizplus · Accepted Answer

Lifting a weight vertically against the force of gravity means you are doing work against gravity. Work is defined as force applied over a distance in the direction of the force, and in this case, the force is gravity.

If You Lift a 15-N Weight Vertically 30 M Above