Questions in Laws of Motion

Select	Question
	Rocket engines lift a rocket from the earth surface because hot gas with high velocity
	A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. by what velocity the gun rebounds backwards
	A bullet of mass 5 g is shot from a gun of mass 5 kg. The muzzle velocity of the bullet is 500 m/s. The recoil velocity of the gun is
	A force of 50 dynes is acted on a body of mass 5 g which is at rest for an interval of 3 seconds, then impulse is
	A body of mass M at rest explodes into three pieces, two of which of mass M/4 each are thrown off in perpendicular directions with velocities of 3 m/s and 4 m/s respectively. The third piece will be thrown off with a velocity of
	The momentum of a system is conserved
	A body of mass 0.25 kg is projected with muzzle velocity $100\,m{s^{ - 1}}$ from a tank of mass 100 kg. What is the recoil velocity of the tank
	A bullet is fired from a gun. The force on the bullet is given by $F = 600 - 2 \times {10^5}t$, where F is in newtons and t in seconds. The force on the bullet becomes zero as soon as it leaves the barrel. What is the average impulse imparted to the bullet
	A bullet of mass 0.1 kg is fired with a speed of 100 m/sec, the mass of gun is 50 kg. The velocity of recoil is
	A bullet mass 10 gm is fired from a gun of mass 1kg. If the recoil velocity is 5 m/s, the velocity of the muzzle is