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Calculate the Energy needed to push a rock weighing of 100kg for 2 metre? |
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Answer» ans is zeroExplanation:for pulling u require FORCE ..in this CASE gravitational force i.e. weight is acting DOWNWARD and u have to push a body in translation motion so angle between force and displacement is 90 ° As work done is equal to dot product of force and displacement so COS theta is cos 90° which is equal to zeroIt MEANS work done is zerowork done= change in K.Eif initially body is rest then energy stored in body is zero joule |
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