Question

multiple choice question
an apple at rest on a table has two forces acting on it, the normal force and the gravitational force. the reaction force to the gravitational force is
○ the gravitational force of the apple on the earth.
○ the table pushing up on the apple to make sure it does not fall down.
○ the normal force.
○ there is no reaction force to gravity.

Explanation:

Newton's third law states that for every action force, there is an equal and opposite reaction force that acts on a different object. The gravitational force on the apple is the Earth pulling the apple downward. The reaction force is the apple pulling the Earth upward with an equal gravitational force. The normal force and table's upward push are the reaction to the apple's push on the table, not gravity's reaction.

Answer:

the gravitational force of the apple on the Earth.