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A circular road is banked at an angle th...

A circular road is banked at an angle `theta` for an optimum speed V. The vertical component of the normal reaction on a car driven at the speed V on the road is equal to (in usual notations)

A

Mg

B

`Mg-mu_sNsintheta`

C

`Mg+mu_sNsintheta`

D

`N(1-mu_sNsintheta)`

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