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4 November, 10:44

A car moves at a speed of 50 kilometers/hour. Its kinetic energy is 400 joules. If the same car moves at a speed of 100 kilometers/hour, the its kinetic energy will be joules. The braking at the faster speed is the breaking distance at the slower speed.

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  1. 4 November, 11:22
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    ke prop to v^2

    ke1/v1^2=ke2/v2^2

    400/50x50=joules/100x100

    400x2x2

    1600j
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