Question

While driving along an
along an unbanked
circular road, a two-wheeler rider has
to lean with the vertical. Why is it so?
With what angle the rider has to lean?
Derive the relevant expression. Why
such a leaning is not necessary for a four
wheeler?​

Answer 1

Answer:

When a bicycle takes a turn along an unbanked road, the force of friction fs provides the centripetal force; the normal reaction of the road N is vertically up. If the bicyclist does not lean inward, there will be an unbalanced outward torque , fs.h , due to the friction force that will topple the bicyclist outward. The bicyclist must lean inward to counteract this torque (and not to generate a centripetal force) such that the opposite inward torque of the couple formed by Nand the weight g,mg.a=fsh1.