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Vanshya
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Asked: 2021-02-13T04:33:47+00:00 In:

How high must a body be lifted to gain an amount of P.E. equal to the K.E. it has when moving at speed 20 ms⁻¹. (The value of acceleration due to gravity at a place is 9.8 ms⁻²).

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NCERT Solutions for Class 11 Science Work energy and power 4
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Work energy and power
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2020-2021cbsechapter 4class 11class 11 sciencencertphysicssciencework energy and power
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    1 Answer

    1. mgh = mv²/2

      so h = 20.4 m

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