Question

"Every action has its equal and opposite reaction" is Newton's:

• A. First law of motion
• B. Second law of motion
• C. Third law of motion
• D. Fourth law of motion

Answer 1

The correct option is C Third law of motion

Newton's third law of motion states that every action has an equal and opposite reaction. Force on a body 2 applied by the body 1 $\left(F_{21}\right)$ is equal and opposite to the force on body 1 applied by the body 2 $\left(F_{12}\right)$, i.e.

$F_{21}=-F_{12}$