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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceDiagram basedMediumData or graph

JEE Main 29 July 2022, Shift 1, Physics Q34

Question 34 of 90 in this shift, Physics question 4 of 30, Section A.

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 ν\nu. 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 (ν\nu) ?

The figure, in words

A circular flat disc-shaped groove with a smooth vertical wall; a block of mass m moves along the wall with speed ν\nu (arrow pointing left on the block).
  1. (1)[figure: graph of N vs ν\nu, curve starting at origin and rising with increasing slope (convex, parabola-like)]Official answer
  2. (2)[figure: graph of N vs ν\nu, straight line through origin]
  3. (3)[figure: graph of N vs ν\nu, horizontal straight line (N constant)]
  4. (4)[figure: graph of N vs ν\nu, curve rising steeply from origin then flattening (concave)]

Official answer

Option 1

NTA final key.

Chapter
Laws of Motion
Topic
Circular Motion
Idea tested
Centripetal Acceleration

Same idea in other shifts

Asked 6× in all
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  2. 1 Feb 2024, Shift 1 · Q34A ball of mass 0.5 kg is attached to a string of length 50 cm. The ball is rotated on a horizontal circular path about its vertical axis.…EasySingle correct
  3. 29 Jan 2024, Shift 1 · Q33If the radius of curvature of the path of two particles of same mass are in the ratio 3:4, then in order to have constant centripetal…EasySingle correct
  4. 13 Apr 2023, Shift 2 · Q34A vehicle of mass 200200 kg is moving along a levelled curved road of radius 7070 m with angular velocity of 0.20.2 rad/s. The centripetal…EasySingle correct
  5. 26 Feb 2021, Shift 1 · Q10A particle is moving with uniform speed along the circumference of a circle of radius R under the action of a central fictitious force F…MediumSingle correct

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.