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 | 20th 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!!
 
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Answered by  | 20th Jan, 2011, 10:19: PM

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