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A cylist travelling at 10m/s applies brakes and stops in 25m m. The graph shows the magnitude of the braking force versus the distance travelled. What is the total mass of bike and cyelist?A. 20 kgB. 40kgC. 64 kgD. 80kg |
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Answer» Area under curve=work done `=160xx15+(160xx10)/(2)=3200` `(1)/(2)xxmxx10^(2)=3200rArrm=64kg` |
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