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A scooterist moving with a speed of 36m...

A scooterist moving with a speed of `36m kmh^(-1)` sees a child standing in the middle of the raod he applies the brakes and brings the scooter to rest in 5s just in time to saved child calculate the average retarding force on the vehicle if mass of the vehicle and drive is 300 kg

Text Solution

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Give `u= 30 kmh^(-1) = 36xx (5)/(18)`
` =10ms^(-1) , v=0 t = 5s`
`a= (v-u)/(t ) = (0-10)/(5 ) = -2 ms^(-2)`
Rectardation `=2ms^(-2)`
Average retarding force = mass `xx` relardation
`300 xx 2 = 600N`
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