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According to work energy principle, wor...

According to work energy principle, work done by …………………..in displacing body …………………to…………………… in………………. .

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net force `,` is equal `,` change `,` kinetic energy of the body.
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According to work energy theorem or work energy principle, work done by net force in displacing a body is always equal to change in K.E. of the body. Similarly , if some work is drawn from the body, K.E. of the body decreases by the same amount. In either process, we assume that potential energy of the body does not change. Read the above passage and answer the following question: (i) A car weighing 500 kg is running at a speed of 72 km//h . In how much distance will it stope by applying a braking force of 4000N? (ii) What are the implication of this theorem in day to day life ?

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