First slide

Vertical circular motion

Question

As the motorcycle moving with a constant velocity ascenda on the overbridge of R, then the normal force on it,

Moderate

A

increases
B

decreases
C

remains the same
D

fluctuates

Solution

Here, the normal reaction is clearly dependent on the angle $θ$
$R = mgcosθ - \frac{{mv}^{2}}{r}$
$R \propto \cos (θ)$
$When θ decreases. R increases.$

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