When a bicycle is motion the force of friction exerted by the ground on the two wheels is such that is acts .
A
in the backward directon on the front wheel and in the forward direction on the rear wheel.
B
in the forward direction on the front wheel and in the backward direction on the rear wheel.
C
in the backward direction on both the front and the rear wheels.
D
in the forward direction on both the front the rear wheels.
Text Solution
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The correct Answer is:
A, C
(a,c) When the cycle is not pedalled but the cycle is in motion (due to previous effort) the wheels move in the direction such that the centre of mass of the wheel move forward. Rolling friction will act in the opposite direction to the relative motion of the centre of mass of the body with respect to ground. Therefore the rolling friction will act in backward direction in both the wheels. The sliding friction will act in the forward direction of rear wheel during pedalling.
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