1.

A car moving at a speed v is stopped in a certain distance when the brakes produce a deceleration a. If the speed of car was nv , what must be the decceleration of the car to stop it in the same distance and in the same time?

Answer»

`n^(3)a`
NA
`n^(2)a`
`sqrt(na)`

Solution :When SPEED is made n times then DISTANCE require to STOP the body by same retarding force become `n^(2)` TIME.


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