First slide

The 3 equation for uniform acc

Question

A car moving with a velocity of $10 {ms}^{- 1}$ can be stopped by the application of a constant force F in a distance of 20 m If the velocity of the car is $30 {ms}^{- 1}$ , it can be stopped by this force in

Moderate

Solution

$s \propto u^{2}$ . If u becomes 3 times, then s will become 9 times, i.e. 9 x 20 = 180 m

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