Question

State the law of conservation of momentum. Why is a person hit harder when he falls on a hard floor than when he falls on sand from the same height? A bullet of mass 20g is fired horizontally with a velocity 100ms⁻¹ from a pistol of mass 1.5 kg. Calculate the recoil velocity of the pistol.

Attempt either (I) with all sub parts or (II) with all sub parts from the following two questions-

Attempt either (I) with all sub parts or (II) with all sub parts from the following two questions-

Imagine a rocket named Vayu-1 that is designed for a space mission. The rocket has a mass of 5,000 kg and is launched from the Earth's surface. The rocket engine produces a constant thrust of 60,000 N. The rocket accelerates vertically upward through the atmosphere. During the ascent, the rocket's engines provide thrust for the first 30 seconds. After that, the rocket continues its motion with a constant velocity due to the thrust being cut off.