+2 moc- pBc 29. For a particle of rest mass m,, kinetic energy T and momentum p, show that T What %3D T +1 mo c2 is the significance of the two extreme cases when (a) T < moc and (b) T > moc?. T Hint: +1 ; B 1 = 1- mo v? ; (b) T = pc 2 = T- 1; R.H.S. = Ans. (a) T = mo c2 30. An electron (rest mass energy 0.511 MeV) has a velocity of c/3. Calculate the loss in its energy when decelerated to half of its velocity. 31. Find the kinetic energy of a neutron (rest mass 942 MeV) if its velocity is 0.8 C. (Ans. 0.024 MeV) (Ans. 628 MeV) 32. Calculate the momentum of a neutron (rest mass 940 MeV) if its kinetic energy is 200 MeV. (Ans. 645 MeV/C)