A car of mass $m$ when passes over top of convex bridge of radius of curvature $r,$ with a velocity $v,$ then the normal force exerted by the bridge on the car is
A car of mass $m$ when passes over top of convex bridge of radius of curvature $r,$ with a velocity $v,$ then the normal force exerted by the bridge on the car is
- A
Zero
- B
$mg$
- C
$mg + \frac{{m{v^2}}}{r}$
- D
$mg - \frac{{m{v^2}}}{r}$
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