A mass sits at rest on top of a table.Which two forces that are not action-reaction pair forces are equal and opposite?
A) the force of gravity on the mass due to the earth and the force of gravity on the earth due to the mass
B) the contact force on the mass due to the table and the contact force on the table due to the mass
C) the force of gravity on the mass due to the earth and the contact force on the table due to the mass
D) the force of gravity on the mass due to the earth and the contact force on the mass due to the table
E) the contact force on the mass due to the table and the force of gravity on the earth due to the mass

Question

Quizplus · Accepted Answer

The force of gravity on the mass due to the earth (weight) is balanced by the contact force (normal force) on the mass due to the table, keeping the mass at rest.

A Mass Sits at Rest on Top of a Table