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The work done by all the forces (external and internal) on a system equals the change in

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The work done by all the forces (external and internal) on a system equals the change in
(a) total energy (b) kinetic energy (c) potential energy (d) none of these.
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1 Answer

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Best answer

(b) kinetic energy 

Explanation:- 

Though work done by external forces will change the total energy of the system, work done by the internal forces will increase kinetic energy only. So when both do work KE is sure to change.

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