A motor cycle is going on an overbridge of radius R. The driver maintains a constant motion . It the stone travles.

Options

A. increase
B. decreases
C. remains the same
D. flutuates erratically

Answer

A

Explanation

Reaction of normal force on the motor cyclist,

`Mg costheta-N=(mv^(2))/(R)rArr N =cos theta -(Mv^(2))/(R)`
As the motor cyclist moves upward on the bridge, `theta` decreases and therefore , N increases and becomes maximum at the highest points .