A bullet of mass 10 g is fired horizontally 1000 m/s from a rifle situated at a height 50 m  above the ground. If the bullet reaches the ground with velocity 500 m/s the work done against air resistance in the trajectory of the bullet in joule is `(g = 10 m/s^(-2))`

A bullet of mass 10 gm is fired horizontally with a velocity 1000 ms^(-1) from a riffle situated at a height 50 m above the ground. If the bullet reached the ground with a velocity 500 ms^(-1) , the work done against air resistance in the trajectory of the bullet is (in joule) (g = 10 ms^(-2)) .

A bullet of mass 10 g is fired with a velocity of 100 m/s from a rifle of mass 2.5 kg, the recoil velocity of the rifle is

A bullet of mass 10 g is fired with a velocity of 100 m/s from a rifle of mass 2.5 kg, the recoil velocity of the rifle is

A body of mass 2 kg is dropped from rest from a height 20 m from the surface of Earth. The body hiys the ground with velocity 10 m/s, then work done (g=10m//s^(2))

A body of mass 2 kg is dropped from rest from a height 20 m from the surface of Earth. The body hits the ground with velocity 10 m/s, then work done: (g=10m//s^(2))