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Numerical problems Calculate The kinet...

Numerical problems Calculate
The kinetic energy of a boy of mass 50 kg sitting in a car moving with a uniform velocity of 72 km/hr

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velocity of the boy = velocity of the car =72 km h
`=72xx5/10ms^(-1)`=20ms
K.E of the boy `=1/2mv^2=1/2xx50kgxx(20ms^(-1)^2=10000J`
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S CHAND IIT JEE FOUNDATION-WORK AND ENERGY-QUESTION BANK -3
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