Question

108. When a car crosses a convex bridge, the bridge exert
a force on it. It is given by
(a)
F= mg +
(b) F= mv
(c)
my?
F=mg - -
(d) F= mg +​

Answer 1

Answer:

Let us suppose that the body exerts a force N on the surface when it travels through the convex surface.

The forces on the car is mg downwards and N upwards.

Hence the total force mg−N will provide the essential centripital acceleration to the car.

Hence mg−N=   mv^2/R

hence n=mg-mv^2/R

 

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I hope this answer will help you

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