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.

A force of 10 N is applied to a mass of 2 kg at rest. What will be its velocity after 5 seconds?

A truck of mass M is moved under a force F. If the truck is then loaded with an object equal to the mass of the truck and the driving force is halved, then how does the acceleration change?

Using second law of motion, derive the relation between force and acceleration. A bullet of 10 g strikes a sand-bag at a speed of 10³ m s⁻¹ and gets embedded after travelling 5 cm. Calculate