Answer to Question #82291 in Physics for lee strain

Question #82291

if a car has 4000J of kinetic energy, how much work done wound be needed to bring the car to a halt

Expert's answer

change of kinetic energy=work done

ΔKE=KE_f-KE_i=W

Since KE_f=0, we get

W=-KE_i=-4000 J

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