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A small block of mass 1 kg is at rest on...

A small block of mass 1 kg is at rest on a parabolic surface given by `y = x^2`. The coefficient of friction between the block and the surface is enough to prevent slipping. If position of block on surface is (2 m, 4 m), then the normal force that the surface exerts at this position is

A

`g/2 N`

B

`g/sqrt5 N`

C

N

D

`g/sqrt17 N`

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