JEE Main 2021 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 25 February 2021, Shift 1, Physics Q24

Question 24 of 90 in this shift, Physics question 24 of 30, Section B.

A small bob tied at one end of a thin string of length 1 m is describing a vertical circle so that the maximum and minimum tension in the string are in the ratio 5 : 1. The velocity of the bob at the highest position is __________ m/s. (Take g=10 m/s

^2

)

Official answer

NTA final key.

Chapter: Work, Energy and Power
Topic: Circular Motion
Idea tested: Vertical Circular Motion

Same idea in other shifts

Asked 7× in all

24 Jun 2022, Shift 2 · Q33A stone of mass m, tied to a string is being whirled in a vertical circle with a uniform speed. The tension in the string isEasySingle correct
26 Jun 2022, Shift 1 · Q34A ball is released from rest from point P of a smooth semi-spherical vessel as shown in figure. The ratio of the centripetal force and…HardDiagram basedHas a figure
27 Jun 2022, Shift 2 · Q35A stone tide to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At a certain instant…MediumSingle correct
3 Aug 2021, Shift 1 · Q21The given figure shows a loop-the-loop track having radius 760 $cm$ . A car without engine starts from a platform at a distance ‘ $h$ ' above…MediumNumerical valueHas a figure
4 Aug 2021, Shift 2 · Q25A small solid spherical marble of mass M and radius 5 cm rolls along loop track without slipping. The height above the base, from where it…HardNumerical valueHas a figure
27 Aug 2021, Shift 2 · Q23A bullet of 10 g, moving with velocity $v$ , collides head-on with the stationary bob of a pendulum and recoils with velocity 100 m/s. The…MediumNumerical 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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.