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  4. 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) ?

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Q. 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) ?Physics Question Image

JEE MainJEE Main 2022Laws of Motion

Solution:

$N =\frac{ mv ^2}{ r }$
Curve is parabola
$Y = kx ^2$