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

An enemy plane is flying horizontally at an altitude of 2 km with a speed of 300 ms^(-1) An army man with an anti-aircraft gun on the ground sights hit enemy plane when it is directly overhead and fires a shell with a muzzle speed of 600 ms^(-1) . At what angle with the vertical should the gun be fired so as to hit the plane ?

An enemy plane is flying horizontally at an altitude of 2km with a speed of 300 ms^(-1) .An army man with an anti-aircraft gun on the ground sights enemy plane when it is directly overhead and fires a shell with a muzzle speed of 600ms^(-1) .At what angle with the vertical should the gun be fired so as to hit the plane?

A fighter plane flying horizontally at an altitude of 2km with speed of 540 kmph passes directly over head an anti aircraft gun.If the gun can fire a bullet at the muzzle speed of 500ms^( - 1) ,at what angle with the vertical the gun should fire the bullet so that the bullet hits the plane?

A shell of mass 200g is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80ms^(-1) , then the recoil speed of the gun is

A shell of mass 200g is fired by a gun of mass 100kg. If the muzzle speed of the shell is 80ms^(-1) , then the rcoil speed of the gun is