JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 25 July 2021, Shift 2, Physics Q21

Question 21 of 90 in this shift, Physics question 21 of 30, Section B.

A force of

F=(5y+20)\hat{j}

N acts on a particle. The workdone by this force when the particle is moved from

y

=0 m to

y

=10 m is __________ J.

Official answer

450

NTA final key.

Chapter: Work, Energy and Power
Topic: Work and Kinetic Energy
Idea tested: Work by Variable Force

Same idea in other shifts

Asked 7× in all

3 Apr 2025, Shift 2 · Q31A block of mass 1 kg, moving along $x$ with speed $v_i = 10$ m/s enters a rough region ranging from $x = 0.1$ m to $x = 1.9$ m. The…MediumSingle correct
9 Apr 2024, Shift 2 · Q51A force $(3x^2+2x-5)$ N displaces a body from $x=2$ m to $x=4$ m. Work done by this force is ___________ J.EasyNumerical value
11 Apr 2023, Shift 1 · Q59A force $\vec{F} = (2 + 3x)\hat{i}$ acts on a particle in the $x$ direction where F is in newton and $x$ is in meter. The work done by…EasyNumerical value
15 Apr 2023, Shift 1 · Q54A block of mass 10 kg is moving along x-axis under the action of force $F = 5x\ N$ . The work done by the force in moving the block from…EasyNumerical value
28 Jun 2022, Shift 2 · Q33A block of mass 2 kg moving on a horizontal surface with speed of 4 ms $^{-1}$ enters a rough surface ranging from $x$ =0.5 m to $x$ =1.5 m.…MediumSingle correct
4 Sep 2020, Shift 2 · Q3A person pushes a box on a rough horizontal plateform surface. He applies a force of 200 N over a distance of 15 m. Thereafter, he gets…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.