When collision between the bodies in a system is inelastic in nature then for system ____________________?
Correct answer: B. K.E changes but momentum remain conserve
- A. momentum changes but K.E remain conserve
- B. K.E changes but momentum remain conserve
- C. both momentum and K.E changes
- D. both momentum and K.E remain conserve
Explanation
In an isolated system, internal forces during an inelastic collision cancel in pairs, so total momentum remains conserved, while some kinetic energy changes into heat, sound or deformation. Thus option b is correct; option d is the common mistake of applying kinetic-energy conservation to every collision.
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About Collisions
Collisions involve the conservation of linear momentum when bodies interact for a short time. The topic covers impulse, elastic and inelastic collisions, kinetic energy changes, and the coefficient of restitution, with calculations usually based on one dimensional motion. Momentum remains conserved in isolated collisions, but kinetic energy is conserved only in elastic collisions.
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