Question
Asked Dec 18, 2019
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A car is raised a certain distance in a service-station lift and therefore has potential energy relative to floor. If it were raised twice as high, how much potential energy would it have relative to floor ?

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Given Info: The car was raised twice high, h2 = 2h Formula Used: When any object of mass m is lifted at height h in vertical direction then its potential energy U can be calculated U =mgh as

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Formula Used: When any object of mass m is lifted at height h in vertical direction then its potential energy U can be calculated U = mgh as Calculation: Let m be the mass of the car and lifted at height hị = h . Gravitational acceleration g U1 = mgh1 = mgh otential Energy can be calculated as When thesame car lifted at height 'h, = 2h'. U2 = mgh2 = mg x 2h = 2mgh U2 = 2U1 Potential Energy can be calculated as The potential energy in the second case is twice the first case.

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Physics

Work,Power and Energy

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