1.

The velocity of a car changes from 40 km h-1 to 60km h l. The mass of the car is 1000 kg. Calculate thechange in kinetic energy.

Answer»

KE = m*v*v/2 initial KE = 1000*40*40/2 = 800000J updated KE = 1000*60*60/2 = 1800000 J so difference is 1800000-800000 = 1000000 J



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