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CBSE Class 11-science Answered

The driver of the bus moving with a speed of 36kmph sees a child standing in the middle of the road and brings the bus to rest in 4 seconds just in time to save the child .The total mass of the bu is 300kg. What is the average retarding force on the bus?
Asked by rahmani | 20 Jan, 2011, 12:00: AM
Expert Answer
dear student,
 
a = -36000/4*3600= 2.5m/s^2,
 
F = mXa = 300 X 2.5 = 750 N
 
Please check if the question detail;s are right!!
 
Hope this helps.
Team
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Answered by | 20 Jan, 2011, 10:19: PM
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