A gun fires a shell and recoils horizontally . If the shell travels along the barrel with speed v , the ratio of speed with which the gun recoils if (i) the barrel is horizontal (ii) inclined at an angle of `30^(@)` with horizontal is

If the range of a gun which fires a shell with muzzle speed v is R, then the angle of elevation of the gun is

A gun kept on a striaght horizontal is used to hit a car, traveling along the same road away form the gun with a unfrom speed 20 m//s . The car is at a distance 0f 160 m from the gun, when the gun is fired at an angle of 45^(@) with the horizontal Find the distance of the car from the gun when the shell hits it and the speed of projection of the shell from the gun.

A shell of mass 20 g is fired by a gun of mass 10 kg. If the shell leaves the gun with a speed of 80 m s^(-1)~ , the speed of recoil of the gun is

If the range of a gun which fires a shell with muzzle speed V is R , then the angle of elevation of the gun is

If the range of a gun which fires a shell with muzzle speed V is R , then the angle of elevation of the gun is

If the range of a gun which fires a shell with muzzle speed V is R , then the angle of elevation of the gun is

If the range of a gun which fires a shell with muzzle speed V is R , then the angle of elevation of the gun is

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

A shell of mass 0.020 kg is fired by a gun of mass 100 kg. If the speed of the shell is 80 m/s , the recoil speed of the gun would be