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30. How high must a body be lifted to gain an amount ofpotential energy equal to kinetie energy it has, whenmoving at speed 20 mrt?ICBSE 1997) IAns. 20.4 ml |
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Answer» GIVEN:: K.E = P.E =>1/2MV²=MGH =>H=1/2V²/g PUTTING VALUES H=1/2*20*20/9.8 = 20.4m |
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