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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceDiagram basedEasyData or graph

JEE Main 18 March 2021, Shift 1, Physics Q5

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

The position, velocity and acceleration of a particle moving with a constant acceleration can be represented by :

The figure, in words

Each option shows three graphs (position vs t, velocity vs t, acceleration vs t).
  1. (1)[figure: x(t) straight line with positive intercept rising; v(t) straight line rising from positive intercept; a(t) constant horizontal line]
  2. (2)[figure: x(t) convex curve rising; v(t) straight line falling; a(t) constant horizontal line]
  3. (3)[figure: x(t) convex curve rising; v(t) straight line rising; a(t) constant horizontal line]Official answer
  4. (4)[figure: x(t) straight line rising; v(t) convex curve rising; a(t) constant horizontal line]

Official answer

Option 3

NTA final key.

Chapter
Motion in a Straight Line
Topic
Kinematics in 1D
Idea tested
Uniform Acceleration Equations

Same idea in other shifts

Asked 8× in all
  1. 4 Apr 2024, Shift 2 · Q59A bus moving along a straight highway with speed of 72 km/hkm/h is brought to halt within 4 ss after applying the brakes. The distance…EasyNumerical value
  2. 29 Jan 2024, Shift 1 · Q32A body starts moving from rest with constant acceleration covers displacement S1S_1 in first (p−1)(p-1) seconds and S2S_2 in first pp…MediumSingle correct
  3. 6 Apr 2023, Shift 2 · Q33A particle starts with an initial velocity of 10.0 ms−1^{-1} along xx-direction and accelerates uniformly at the rate of 2.0 ms−2^{-2}.…EasySingle correct
  4. 24 Jun 2022, Shift 2 · Q42An object of mass 5 kg is thrown vertically upwards from the ground. The air resistance produces a constant retarding force of 10 N…MediumSingle correct
  5. 29 Jun 2022, Shift 2 · Q31A small toy starts moving from the position of rest under a constant acceleration. If it travels a distance of 10m in tt s, the distance…EasySingle correct
  6. 25 Feb 2021, Shift 1 · Q14An engine of a train, moving with uniform acceleration, passes the signal-post with velocity uu and the last compartment with velocity…MediumSingle correct
  7. 26 Feb 2021, Shift 2 · Q12A scooter accelerates from rest for time t1t_1 at constant rate a1a_1 and then retards at constant rate a2a_2 for time t2t_2 and comes to…EasySingle 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.