A car of mass m when passes over top of convex bridge of radius of curvature r, with a velocity v, t

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3-2.Motion in Plane

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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

AZero

B$mg$

C$mg + \frac{{m{v^2}}}{r}$

D$mg - \frac{{m{v^2}}}{r}$

Solution

$\mathrm{mg}-\mathrm{N}=\frac{\mathrm{mv}^{2}}{\mathrm{r}}$
$\mathrm{N}=\mathrm{mg}-\frac{\mathrm{mv}^{2}}{\mathrm{r}}$

Standard 11

Physics

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