A smooth circular groove has a smooth vertical wall as shown in figure. A block of mass $m$ moves against the wall with a speed $v$. Which of the following curve represents the correct relation between the normal reaction on the block by the wall $( N )$ and speed of the block $(v)$ ?
JEE MAIN 2022, Medium
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$N=\frac{m v^{2}}{r}$
Curve is parabola
$Y = kx ^{2}$
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