An object of mass m rests on a flat table.The earth pulls on this object with a force of magnitude mg.What is the reaction force to this pull?
A)The table pushing up on the object with force mg.
B)The object pushing down on the table with force mg.
C)The table pushing down on the floor with force mg.
D)The object pulling upward on the Earth with force mg.
E)The table pulling upward on the Earth with force mg.

Question

Quizplus · Accepted Answer

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When the Earth pulls on the object with a force of magnitude mg, the object pulls upward on the Earth with the same force magnitude, making choice D the correct answer.

An Object of Mass M Rests on a Flat Table