A bicycle moves on a horizontal road with some acceleration. The forces of friction between the road and the front and rear wheels are `F_(1)` and `F_(2)` respectively.

Options

A. Both `F_1 and F_2` act in the forward direction
B. Both `F_1 and F_2` act in the backward direction
C. `F_1` acts in the forward direction `F_2` acts in the backward direction
D. `F_1` acts in the backward direction `F_2` acts in the forward direction.

Answer

D

Explanation

When pedalling the bicycle the force of friction `F_2` on the rear wheel of the bicycle is in forward direction and on the front wheel `F_1` is in backward direction.