Question

A free-floating astronaut A pushes another free-floating astronaut B in space. The mass of A is greater than that of B. The force exerted by the astronaut A on the astronaut B will be.

• A. Greater than the force exerted by B on A
• B. Equal to the force exerted by B on A
• C. Equal to zero
• D. Less than the force exerted by B on A

Answer 1

Answer: (B)

Equal to the force exerted by B on A

According to newton third law for every action there is an equal and opposite reaction.

The force on each other are actually action and reaction. So both forces are equal. So the magnitude of the force exerted by astronaut $A$ on $B$ is equal to the force exerted by $B$ on $A$.