A bullet of mass `10 gm` strikes a target at `400 m//s` velocity and does half of its initial velocity. The loss of kinetic energy in joules is

A bag of sand of mass M is suspended by a string. A bullet of mass m is fired at it with velocity v and gets embedded into it. The loss of kinetic energy in this process is

A bullet of mass 80 g strikes a target at 100 cm*s^(-1) . After penetration, its velocity reduces to 50 cm*s^(-1) . How much of its kinetic energy is spent ?

A bullet of mass 20gram strikes a target with a velocity of 100m // s and is brougth to rest after piercing 20cm into it. What is the average force of resistance offered by the target?

A ball of mass 150 gm is thrown vertically upward with a velocity of 10m/sec. What is its initial momentum?

A 50 g bullet moving with velocity 10 m / s strikes a block of mass 950 g at rest and gets embedded in it. The loss in kinetic energy will be

A bullet of mass 4.2 gm is moving at certain velocity. If all its kinetic energy liberated is 20 cal, then the initial velocity of the bullet is

A bullet of mass m = 50 gm strikes a sand bag of mass M = 5 kg hanging from a fixed point, with a horizontal velocity vecv_(p) . If bullet sticks to the sand bag then the ratio of final & initial kinetic energy of the bullet is (approximately) :

A bullet is fired up with velocity equal to escape velocity. The sum of its potential energy and kinetic energy is