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Calculate the kinetic energy of car of mass 500kg moving with velocity of 36km/h.find the kinetic energy if the velocity of car double
Asked by shifatajshaikh947 | 11 Jan, 2021, 08:56: AM
Velocity of car, v = 36 km/hr = 36 × (5/18) = 10 m/s

Mass of car , m = 500 kg

Kinetic energy = (1/2) m v2 = (1/2) × 500 × 10 × 10 = 25000 J = 25 kJ

KInetic energy is proportional to square of velocity .

If velocity doubles, Kinetic energy will becomes four times of its initial value.

Hence if velocity doubles , Kinetic energy = 100 kJ = 105 J
Answered by Thiyagarajan K | 11 Jan, 2021, 09:10: AM

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