JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 31 January 2024, Shift 1, Physics Q33

Question 33 of 90 in this shift, Physics question 3 of 30, Section A.

A coin is placed on a disc. The coefficient of friction between the coin and the disc is

\mu

. If the distance of the coin from the center of the disc is

r

, the maximum angular velocity which can be given to the disc, so that the coin does not slip away, is :

(1) $\frac{\mu g}{r}$
(2) $\sqrt{\frac{\mu g}{r}}$ Official answer
(3) $\sqrt{\frac{r}{\mu g}}$
(4) $\frac{\mu}{\sqrt{rg}}$

Official answer

Option 2

NTA final key.

Chapter: Laws of Motion
Topic: Circular Motion
Idea tested: Coin Slipping on a Rotating Disc

Same topic in other shifts

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.