A bullet of mass 20g is found is found to pass two points 30cm apart in a time interval of 4s. Calculate the kinetic energy of the bullet if it moves with constant speed.

A bullet of mass 20g is found to pass two points 30m apart in 4 s? Assuming the speed to be constant, find its kinetic energy?

A bullet of mass 50g is fired from a gun of mass 2kg. If the total kinetic energy produced is 2050J, the kinetic energy of the bullet and the gun respectively are

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 neutron, one of the constituents of a nucleus, is found to pass two points 60 metres apart in a time interval of 1.8 xx 10^(-4) sec . The mass of the neutron is 1.67 xx 10^(-27) kg . Assuming that the speed is constant, its kinetic energy is

A bullet of mass m moving with velocity v strikes a block of mass M at rest and gets embedded into it. The kinetic energy of the composite block will be

A bullet of mass 7g is fired into block weighing 7kg , which is free to move. Calculate initial velocity of bullet if the velocity of the block with the bullet inside is 0.7m//s .

In an NCC traiign camp, a cadet fired a bullet of mass 50 gram with a speed of 200m/s, on a soft plywood board of thickness 20 mm. It was found that the kinetic energy of the emerging bullet was only 25% of its initial K.E. What is the percentage decrease in the speed of the bullet?

A bullet fired from a gun. As a result the gun recoils the mass of the gun is 100 times the mass of the bullet. The ratio of the kinetic energies of the bullet and the gun will be