Question

does loss im momentum and loss in KE is zero in elastic collision​

Answer 1

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(a) False. In an elastic collision of two bodies, the momentum and energy of the system is conserved.

(b) False. Some energy is lost in heat, so it is not conserved.

(c) False. It is true only for conservative forces. For non-conservative forces, work done over one cycle is not zero.

(d) True. Some energy is lost in internal friction and heat.