Answer to Question #168530 in Physics for akiesya

Question #168530

a car is travelling at 30m/s and has kinetic energy of 450KJ, what is it's mass?

Expert's answer

"KE=\\dfrac{1}{2}mv^2,""m=\\dfrac{2KE}{v^2}=\\dfrac{2\\cdot450\\cdot10^3\\ J}{(30\\ \\dfrac{m}{s})^2}=1000\\ kg."

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