Question

A man is at rest in the middle of a block of smooth ice. He cannot get to the shore by making use of Newton's

• A. first law of motion
• B. second law of motion
• C. third law of motion
• D. first and second law of motion

Answer 1

The correct option is D first and second law of motion

According to Newton's first law, he will be in same state unless it is acted by external force. So, this law is not useful.

Newtons second law states that, ate of change of momentum is directly proportional to applied force. As he is rest, he needs to apply force to move. but this does not help him to get to shore.

While Newton's third law says for every action there is an equal and opposite reaction. So, if he pushes ice block away from shore, he will be pushed back towards shore.

So, he willuse Newton's third law.

So, Option D is correct.