Brakes are applied to car moving with di...

Brakes are applied to car moving with disengaged engine, bringing it to a halt after `2s` Its velocity at the momnet when the breaks are applied if the coefficient of friction between the road and the tyres is `0.4` is .

`3.92ms^(-1)`

`7.84ms^(-1)`

`11.2ms^(-1)`

`19.6ms^(-1)`

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