Brakes are being applied in a car moving with speed 20 m/s which produces a retardation of 5 m/s^2 .

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2.Motion in Straight Line

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Brakes are being applied in a car moving with speed $20\ m/s$ which produces a retardation of $5\ m/s^2$ . The distance travelled by car till it stops is........$m$

A

$20$

B

$30$

C

$40$

D

$50$

Solution

Stopping distance $ = \frac{{{u^2}}}{{2a}} = \frac{{{{(20)}^2}}}{{2(5)}} = 40\,m$

Standard 11

Physics

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