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Q.

A block m slides down a curved frictionless track, starting from rest. The curve obeys the equation y=x22 The tangential acceleration of the block is 

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a

gxx2+1

b

g

c

gxx2+4

d

g2

answer is D.

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Detailed Solution

dydx=tanθ=xsinθ=xx2+1

Tangential acceleration =gsinθ=gxx2+1

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