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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 29 June 2022, Shift 1, Physics Q31

Question 31 of 90 in this shift, Physics question 1 of 30, Section A.

Two balls A and B are placed at the top of 180 m tall tower. Ball A is released from the top at t=0t = 0 s. Ball B is thrown vertically down with an initial velocity 'uu' at t=2t = 2 s. After a certain time, both balls meet 100 m above the ground. Find the value of 'uu' in ms−1\mathrm{ms^{-1}}. [use g=10 ms−2g = 10\ \mathrm{ms^{-2}}] :
  1. (1)10
  2. (2)15
  3. (3)20
  4. (4)30Official answer

Official answer

Option 4

NTA final key (2022 Session 1).

Chapter
Motion in a Straight Line
Topic
Kinematics in 1D
Idea tested
Meeting Point Condition

Same idea in other shifts

Asked 3× in all
  1. 26 Jun 2022, Shift 2 · Q51A ball is projected vertically upward with an initial velocity of 50 ms−1ms^{-1} at t = 0s. At t = 2s, another ball is projected vertically…MediumNumerical value
  2. 26 Aug 2021, Shift 1 · Q29Two spherical balls having equal masses with radius of 5 cm each are thrown upwards along the same vertical direction at an interval of 3…MediumNumerical value

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.