Q64 / 90 · JEE Main 2022 (29 Jul Shift 1) · Physics

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?

Figure

  • Correct answer
    A
    Figure
  • B
    Figure
  • C
    Figure
  • D
    Figure

Solution

The required centripetal force will be provided by the normal reaction

⇒N=mv2r

This equation is similar to y=kx2 which is a parabola.

Hence, the correct answer is option: 'A'.

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