Question

Which of the following involves Newton's second law of motion?

• A. When two bodies of unequal masses are acted upon by the same force for the same time, the momentum gained by both the bodies is the same.
• B. A body at rest moves in the same direction as that of the applied force.
• C. A boy hitting a wall with his hand using muscular force experiences pain
• D. Both (A) and (B)

Answer 1

The correct option is D

Both (A) and (B)

Newton second can be given as:
“The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.”
So a body at rest moves in the same direction as of the applied force.
And, the reaction of wall tries to push the palm in a direction opposite to its initial direction of motion.
The absorption of this impact gives a sensation of pain.