Question

During collision
a) There is a change in momenta of individual bodies
b) The change in total momentum of the system of colliding particle is zero
c) The change in total energy is zero
d) The law of conservation of momentum is not valid

• A. only a & b are true
• B. only b & c are true
• C. a, b & c are true
• D. b, c & d are true

Answer 1

Answer: (C)

a, b & c are true

Energy conservation is valid everywhere i.e. total energy is conserved everytime. In collision, the kinetic energy of the system may get lost. However, the momentum of the system is always conserved and so the change in the momentum of the system is zero.