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Friday, 9 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 16 March 2021, Shift 2, Physics Q25

Question 25 of 90 in this shift, Physics question 25 of 30, Section B.

A solid disc of radius 'a' and mass 'm' rolls down without slipping on an inclined plane making an angle θ\theta with the horizontal. The acceleration of the disc will be 2bgsin⁡θ\frac{2}{b}g\sin\theta where b is ________. (Round off to the Nearest Integer) (g = acceleration due to gravity θ\theta = angle as shown in figure)

The figure, in words

Disc of radius a on an inclined plane of angle theta with the horizontal; point P marked at the contact point on the incline.

Official answer

3

NTA final key.

Chapter
System of Particles and Rotational Motion
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.