The normal reaction acting on a vehicle at the top of a convex over bridge is long ....... (vertically downward direction, vertically upward direction, between surface and wheel of vehicle, in the direction of motion of vehicle). (MCQ )
{ 12th class 1st lesson }
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In convex bridge
By force body diagram
㎎−N=Rmv2
N = Normal force
m= mass, g = acceleration due to gravity
v= velocity, R= Radius
So, N=㎎−RMv2
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