Question

A motorcycle is going on an overbridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the overbridge, the normal force on it
(a) increases
(b) decreases
(c) remains the same
(d) fluctuates.

Answer 1

(a) increases


The normal force on the motorcycle, $N=mg\cos \theta -\frac{m{v}^2}{R}$
As the motorcycle is ascending on the overbridge, θ decreases (from $\frac{\pi }{2}$ to 0).
So, normal force increases with decrease in θ.