A car of mass 2000kg is moving with velocity of 18 km/hr. Work done to stop this car
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Answer:
-25000 J
Explanation:
initial velocity:18*5/18 m/s=5 m/s
final velocity: 0 m/s
work done to stop the car of mass is= final kinetic energy- initial kinetic energy
therefore,
W= 1/2 m(vf^2-vi^2)
W= 1/2*2000*(0^2-5^2)
W= -25000 J or -25 kJ
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