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Is frictional force by the road zero on a vehicle if it is moving with constant velocity on the road?

Is frictional force by the road zero on a vehicle if it is moving with constant velocity on the road?

Grade:12th pass

2 Answers

bhawani
33 Points
8 years ago
no 
frictional force depends on normal reaction
erra akhil
208 Points
8 years ago
Dear KSR,
As far as my knowledge is concern,
No the frictional force is not zero, there is some frictional force acting.
For example,
A cycle after pedalling for some time it moves with some velocity after pedalling,
Slowly we see that the cycle starts to slow down this is due to frictional force acting by road.
As told by bhavani frictional force depends on the normal reaction.

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