cheyennereimers15 cheyennereimers15

22-03-2022
Physics

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an object moving at 10 km/h has a kinetic energy of 10 J. what is the kinetic energy of the same object if it is moving at 20 km/h

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indrawboy indrawboy

22-03-2022

KE = 1/2 mv²

v = 10 km/h = 2.78 m/s

v = 20 km/h = 5.56 m/s

10 = 1/2 m . 2.78²

m = 2.59 kg

KE = 1/2 x 2.59 x 5.56²

KE = 40.03 J

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