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On collision of two balls linear momentum is conserved, it implies that even kinetic energy will remain conserved. True or False?

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in Physics – Class 11 by (74.2k points)
On collision of two balls linear momentum is conserved, it implies that even kinetic energy will remain conserved. True or False?

(a) True

(b) False

This question was posed to me in my homework.

This key question is from Linear Momentum of a System of Particles topic in division System of Particles and Rotational Motion of Physics – Class 11

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Right answer is (b) False

The best explanation: On collision of two balls, there is no external force, so the total momentum will be conserved. But due to internal forces there could be loss of energy in the form of heat, sound or deformation (potential energy) and hence final kinetic energy will be less than or equal to initial kinetic energy.

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