A bullet of mass 1 kg is fired and gets embedded into a block of wood of mass 1 kg initially at rest. The velocity if the bullet before collision is 90m/s.
(a) What is the velocity of the system after collision.
(b) Calculate the kinetic energies before and after the collision?
(c) Is it an elastic collision or inelastic collision?
(d) How much energy is lost in collision?
