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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumConceptual

JEE Main 17 March 2021, Shift 1, Physics Q29

Question 29 of 90 in this shift, Physics question 29 of 30, Section B.

The following bodies, (1) a ring (2) a disc (3) a solid cylinder (4) a solid sphere, of same mass 'm' and radius 'R' are allowed to roll down without slipping simultaneously from the top of the inclined plane. The body which will reach first at the bottom of the inclined plane is __________. [Mark the body as per their respective numbering given in the question]

The figure, in words

An inclined plane (right triangle) with angle θ\theta marked at the lower left corner; a small circle (the rolling body) drawn at the top of the incline; the length along the slope is marked S with a double-headed arrow, and the vertical height on the right side is marked h with a double-headed arrow.

Official answer

4

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 108 of the 174 JEE Main shifts held from 2017 to 2026.