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A bus moving with a speed of 54km/h on applying brakes it stopped in 8 sec calculate acceleration

Posted by Vansh Tandon 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 5 months ago

Initial Speed (u)= 54 km /hr = 54 *1000 m / 3600 s = 54*5/18 = 15 m/s
         ( 1km = 1000 m and 1hr = 60 mins = 60*60 seconds = 3600 seconds)
        Time = 8 seconds
       Final Velocity (V) = 0
we know that ,
         v = u + at
         0 = 15 + a*8
       0 = 15 + 8a
       a= -15/8 m/s²
   Therefore , acceleration is -15/8 m/s²

0Thank You

ANSWER

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CBSE > Class 09 > Science