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Friday, 9 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 29 June 2022, Shift 1, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

A block of metal weighing 2 kg is resting on a frictionless plane (as shown in figure). It is struck by a jet releasing water at a rate of 1 kgs−11\ \mathrm{kgs^{-1}} and at a speed of 10 ms−110\ \mathrm{ms^{-1}}. Then, the initial acceleration of the block, in ms−2\mathrm{ms^{-2}}, will be :

The figure, in words

A 2 kg block on a frictionless horizontal plane is struck from the left by a horizontal water jet from a nozzle; block accelerates to the right (a = ?).
  1. (1)3
  2. (2)6
  3. (3)5Official answer
  4. (4)4

Official answer

Option 3

NTA final key (2022 Session 1).

Chapter
Laws of Motion
Topic
Newton's Laws of Motion
Idea tested
Force Exerted by a Fluid Jet

Same topic in other shifts

All Newton's Laws of Motion questions
  1. 4 Apr 2026, Shift 2 · Q28At t=0t=0, a body of mass 100 g starts moving under the influence of a force (5i^+10j^)\left(5\hat i+10\hat j\right) N. After 2 s its position is…EasySingle correct
  2. 5 Apr 2026, Shift 1 · Q29Three masses m1=4m_1 = 4 kg, m2=4m_2 = 4 kg and m3=6m_3 = 6 kg are suspended from a fixed smooth frictionless pulley as shown in the figure…MediumSingle correctHas a figure
  3. 5 Apr 2026, Shift 1 · Q30A wedge YY with mass of 10 kg and all frictionless surfaces and the inclined surface making 37∘37^\circ with horizontal. A block XX with…HardSingle correctHas a figure
  4. 6 Apr 2026, Shift 1 · Q29Two blocks (PP and QQ) with respectively masses 2 kg and 1.5 kg are joined by a massless thread. These blocks are mounted on a…HardSingle correctHas a figure
  5. 2 Apr 2025, Shift 2 · Q29A body of mass 1 kg is suspended with the help of two strings making angles as shown in figure. Magnitudes of tensions T1T_1 and T2T_2,…EasySingle correctHas a figure
  6. 7 Apr 2025, Shift 2 · Q28An object with mass 500 g moves along xx-axis with speed v=4xv=4\sqrt{x} m/s. The force acting on the object is :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 42 of the 174 JEE Main shifts held from 2017 to 2026.