A bullet of mass 50 g moving with an initial velocity 100 m/s, strikes a wooden block and comes to rest after penetrating a distance 2 cm in it. Calculate : (i) initial momentum of the bullet, (ii) final momentum of the bullet, (iii) retardation caused by the wooden block, and (iv) resistive force exerted by the wooden block.
Mass of the bullet, m = 50 g = 0.05 kg
Initial velocity, u = 100 m/s