Underline the correct alternative:
(a) The rate of change of total momentum of a many-particle system is proportional to the external force/sum of the internal forces on the system
(b) In an inelastic collision of two bodies, the quantities which do not change after the collision is the total kinetic energy/total linear momentum/total energy of the system of two bodies.

3 years ago

(a) External force

Internal forces, regardless of their direction, cannot cause a change in momentum. As a result, the change in total momentum is proportional to the system’s external force.

(b) Total linear momentum

The total linear momentum remains the same whether the impact is elastic or inelastic.