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The driver of a three-wheeler moving with a speed of 36 km/h sees a child standing in the middle of the road and brings his vehicle to rest in 4.0 s just in time to save the child. If the mass of the three wheeler is 400 kg and the mass of the driver is 65 kg, the average retarding force on the vehicle is

A

1000 N

B

1162 N

C

4650 N

D

465 N

Text Solution

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The correct Answer is:
B
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The driver of a three -wheeler moving with a speed of 36 km/ h sees a child standing in the middle of the road and brings his vehicle to rest in 4. 0 s just in time to save the child . What is the average retarding force on the vehicle ? The mass of the three wheeler is 400 kg and the mass of the driver is 65 kg .

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