Question

Which of the following is practical applications of the law of conservation of linear momentum?

• A. When a man jumps out of a boat on the shore, the boat is pushed slightly away from the shore
• B. A person left on a frictionless surface can get away from it by blowing air out of his mouth or by throwing some object in a direction opposite to the direction in which he wants to move.
• C. Recoiling of a gun
• D. None of these

Answer 1

Answer: (A), (B), (C)

The correct options are
A When a man jumps out of a boat on the shore, the boat is pushed slightly away from the shore
B A person left on a frictionless surface can get away from it by blowing air out of his mouth or by throwing some object in a direction opposite to the direction in which he wants to move.
C Recoiling of a gun

(A) When a man jump out of a boat on the stone then in this process no another external force is applied on boat and man system. therefore here momentum conserve. it is a application.

(B) If floor is frictional less then here also no external force on the man. it is also a practical.

(C) When a gun fire then gun bush back due to liner momentum conservation.