# General Physics: Work and Newton's third law

1. Nancy claims that she does more work in lifting her toddler each day than Atlas ever did when holding the whole world on his shoulders. is she correct?

2. Given Newton's third law of motion, why is there no "equal and opposite reaction" when you jump into the air?

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1. Nancy claims that she does more work in lifting her toddler each day than Atlas ever did when holding the whole world on his shoulders. is she correct?

Yes she is correct

In physics when we apply a force on a body and it get displaced we say we did work. Work done is directly proportional to the force applied and the displacement of the point of application of force in the direction of force. Thus if we apply a force F and the point at which force is acting is displaced by x in that direction then the work done W is mathematically given as

W = F*x

Thus the ...

#### Solution Summary

Two questions are answered to develop concepts of work and action reaction forces.