kinetic energy of a system cannot be increased without applying any external force on the system.
true or false?????????
its given to be false?????
how can this be?????
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4 Answers
1definitely false.
Consider an explosion or if an explosion may seem too scary
think of radioactive decay.
1another example: rotational KE can be increased wthout applying external force, e.g., action of a couple on a rigid body