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Two cars are moving with a velocity of 36 km hr and 54 km hr on a highway what is the ratio if the mass of car is 400 kg and 600 kg respectively |
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Answer» We can get their ratio by getting their RESPECTIVE kinetic ENERGIES. Kinetic energy = 0.5mv² V should be in meters PER second. Car A : V = 36 × 5/18 = 10m/s KE = 0.5 × 10² × 400 = 20000joules Car B: V= 54 × 5/18 = 15m/s KE = 0.5 × 15² × 600 = 67500 joules The ratio of A to B is 8 : 27 |
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