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A truck running at a speed …

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A truck running at a speed of 90 km/hr slows down to 54km/hr at the distance of 20m. Find the retardation caused by brakes and the time taken.

Posted by Jolie Mehra 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 3 years, 9 months ago

54*5/18=15m/s

v²-u² =2as

15²-25²=2*a*20

225-625=2a*20

2a=400/20

2a=20

a=20/2

a=10m/s²

v=u+at

15=25-10t

10t=25-15

t=10/10

t=1s

0Thank You

ANSWER

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CBSE > Class 09 > Science