Answer to Question #154980 in Physics for Bilal Ghani

Question #154980

A battery powered toy car accelerates from 0.0 m/s to 8.5 m/s. It’s mass is 0.55kg. The chemical store in its battery is decreased by 30J. Calculate the efficiency of this process

Expert's answer

"\\eta=\\frac{K}{E}\\\\\\eta=\\frac{mv^2}{2E}\\\\\\eta=\\frac{0.55\\cdot8.5^2}{2\\cdot30}=0.66"

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