JEE Main 2026 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 4 April 2026, Shift 1, Physics Q49

Question 49 of 75 in this shift, Physics question 24 of 25, Section B.

A 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

\hat{i}

and

\hat{j}

are unit vectors along

x

and

y

-axis respectively. The power produced by the force at

t=2

s is ______ W.

Official answer

200

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

7 Apr 2025, Shift 1 · Q28An 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…MediumSingle correct
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.