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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedEasyCalculation

JEE Main 30 January 2024, Shift 1, Physics Q35

Question 35 of 90 in this shift, Physics question 5 of 30, Section A.

A particle is placed at the point A of a frictionless track ABC as shown in figure. It is gently pushed towards right. The speed of the particle when it reaches the point B is : (Take g=10 m/s2g = 10\ \mathrm{m/s^2}).

The figure, in words

Frictionless track ABC: A on the left horizontal ledge, curved (semicircular-like) dip, rising to C on the right at the same level as A. Height of A above the lowest point is 1 m; point B on the left curve is 0.5 m above the lowest point.
  1. (1)10 m/s10\ \mathrm{m/s}
  2. (2)10 m/s\sqrt{10}\ \mathrm{m/s}Official answer
  3. (3)210 m/s2\sqrt{10}\ \mathrm{m/s}
  4. (4)20 m/s20\ \mathrm{m/s}

Official answer

Option 2

NTA final key.

Chapter
Work, Energy and Power
Topic
Work and Kinetic Energy
Idea tested
Conservation of Mechanical Energy

Same idea in other shifts

Asked 7× in all
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  5. 26 Feb 2021, Shift 2 · Q8A cord is wound round the circumference of wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about it is I.…MediumSingle correct
  6. 18 Mar 2021, Shift 1 · Q24As shown in the figure, a particle of mass 10 kg is placed at a point A. When the particle is slightly displaced to its right, it starts…EasyNumerical valueHas a figure

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.