Question

which of the following works on the principle of the momentum
a. a gun recoils after firing
b. rocket
c.the case of hose pipe
d.all of the above

Answer 1

here's your answer man...
.
d) all of the above

Answer 2

Answer:

The correct option is (d) all of the above.

Explanation:

• The balloon and the air inside it form a sort of system in the air-filled balloon. Since the system is initially at rest, its momentum is also zero.
• Before shooting, both the gun and the bullet are at rest, therefore the momentum of the system is zero.
• As soon as the balloon is let free, air rushes out with some great velocity, propelling the balloon ahead in the direction opposite to the air rushing out. When a bullet is fired, it advances while the gun recoils back.
• The law of conservation of momentum also governs the operation of rockets and jet engines. These machines gain an equal and opposite momentum as a result of the hot gases that are released when fuel is burned.

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