A person is moving towards a tall vertical wall with certain speed and fires bullets on a target put on the wall with a rate of 5 bullets per second. If the bullets are travelling with a speed of 300 m/s and bullets received on the target is 6 bullets per second then the speed of person is

A machine gun fires n bullets per second and the mass of each bullet is m. If v is the speed of each bullet, then the force exerted on the machine gun is

A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5 g with the same velocity at the same rate of 10 bullets per second. The bullets rebound with the same speed in opposite direction. Find the velocity of each bullet at the time of impact.

A machine gun has a mass of 20kg. It fires 35 g bullets at the rate of 4 bullets per second, with a speed of 400 ms^(-1) . What force must be applied to the gun to keep it in position?

A disc of mass 10 g is kept floating horizontal in the air by firing bullets, each of mass 5g, with the same velocity at the same rate of 10 bullets per second. The bullets rebound with the same speed in positive direction . The velocity of each bullet at the time of impact is (Take g = 9.8 ms^(-2))

A disc of mass 0.5kg is kept floating horizontally in mid air by firing bullets of mass 5 g each, vertically at it at the rate of 10 per second. If the bullets drop dead. The speed of the bullet striking the disc is (g=10 ms^(-2) )

A gun fires N bullets per second, each of mass m with velocity v. The force exerted by the bullets on the gun is :

A machine gun has a mass 5 kg. It fires 50 gram bullets at the rate of 30 bullets per minute at a speed of 400" m s"^(-1) . What force is required to keep the gun in positon ?

If , a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gun is

A machine gun bullet of mass m leaves the barel at a speed of 100 ms^(-1) and has a kinetic energy of 1000 J. what is the mass of bullet ?

A machine gun fires a steady stream of bullets at the rate of n per minute into a stationary target in which the bullets get embedded. If each bullet has a mass m and arrives at the target with a velocity v, the average force on the target is