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 (in %)
Initial K.E. of system = K.E. of the bullet =
By the law of conservation of linear momentum
Fractional loss in K.E. =
By substituting
we get
Fractional loss = Percentage loss = 95%