Which of the following events, does NOT involve a resultant force?

Throwing a ball

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Heating a ball

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Pressing a moving block to stop it

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Twisting a rod

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Solution

The correct option is B
Heating a ball

All the events discussed here involve the action of a force. A force is required to change the state of rest or that of motion or change the shape/size of the object. Heating of a ball does not involve a force in this case since it does not change the state of motion of the object.

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