JEE Main 2025 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 7 April 2025, Shift 1, Physics Q28

Question 28 of 75 in this shift, Physics question 3 of 25, Section A.

An object of mass 1000 g experiences a time dependent force

\vec{F} = \left(2t\,\hat{i} + 3t^2\,\hat{j}\right)\mathrm{N}

. The power generated by the force at time t is:

(1) $(2t^2 + 3t^3)$ W
(2) $(2t^3 + 3t^5)$ WOfficial answer
(3) $(2t^2 + 18t^3)$ W
(4) $(3t^3 + 5t^5)$ W

Official answer

Option 2

NTA final key.

Chapter: Work, Energy and Power
Topic: Power
Idea tested: 3D Vector Calculation of Power

Same idea in other shifts

Asked 3× in all

4 Apr 2026, Shift 1 · Q49A body of mass $2$ kg begins to move under the influence of time dependent force $\vec{F}=\left(2t\,\hat{i}+6t^2\,\hat{j}\right)$ N, where…MediumNumerical value
31 Jan 2024, Shift 2 · Q35A body of mass 2 kg begins to move under the action of a time dependent force given by $\vec{F}=\left(6t\,\hat{i}+6t^2\,\hat{j}\right)$ N.…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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.