A motorcycle is going on an over bridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on it
A) increases
B) decreases
C) remains the same
D) fluctuates
Correct Answer:
A
Solution :
Here, \[R=mg\,\,\cos \theta -\frac{m{{v}^{2}}}{R}\] It is clear from the figure that a decreases with height, so that \[\cos \theta \] increases and as a result of which normal force N increases.