Can a body perform work if it does not have stored energy. Calculate the work required to stop a car of 1500 kg mass moving at a velocity of 36 Km/h.
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Answer:
75,000 J
Explanation:
1.) Yes, energy doesn't necessarily have to be in the form of stored energy. It can be kinetic energy, which could be used to heat up water to steam.
2.)
We know:
Work is nothing but energy, so the energy required to bring the car to a complete stop.
This would be the energy to make the K.E equal to 0.
W = 1/2 x 1500 x (36 x 5/18 )(36 x 5/18)
W = 75,000 J
Hope it helps!
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