A bus can be stopped by applying a retarding force F when it is moving with speed v on a level road. The distance covered by it before coming to rest is S. If the load of the bus increases by 50% because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be
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a
1.5 s
b
2 s
c
1 s
d
2.5 s
answer is A.
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Detailed Solution
First case :12mv2 = F.S⇒12M+m2v2=Fs'Dividing Eq. (ii) by Eq. (i), we get s's=32or s' = 1.5 s
A bus can be stopped by applying a retarding force F when it is moving with speed v on a level road. The distance covered by it before coming to rest is S. If the load of the bus increases by 50% because of passengers, for the same speed and same retarding force, the distance covered by the bus to come to rest shall be