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Potential Energy of an Object at a Height

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Question

calculate the kinetic energy of a car of mass 750 kg moving with a velocity of 72km/hr.find the kinetic energy if the velocity of the car becomes three times

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Solution

Given mass, m = 750 kg
v = 72 km/hr
use the formula :
K.E. = 1/2 mv²
Substitute the values in the above given formula to get your answer.
For the IInd case:
take v = 72 X 3 = 216 km/hr and proceed the same method as explained above.

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Potential Energy of an Object at a Height

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