JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 13 April 2023, Shift 2, Physics Q51

Question 51 of 90 in this shift, Physics question 21 of 30, Section B.

A car accelerates from rest to u m/s. The energy spent in this process is E J. The energy required to accelerate the car from u m/s to 2u m/s is nE J. The value of n is ______ .

Official answer

NTA final key.

Chapter: Work, Energy and Power
Topic: Work and Kinetic Energy
Idea tested: Kinetic Energy Calculation

Same topic in other shifts

All Work and Kinetic Energy questions

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5 Apr 2026, Shift 2 · Q28A mass of 1 kg is kept on a inclined plane with $30^\circ$ inclination with respect to horizontal plane and it is at rest initially. Then…MediumSingle correct
6 Apr 2026, Shift 1 · Q28The rain drop of mass 1 g, starts with zero velocity from a height of 1 km. It hits the ground with a speed of 5 m/s. The work done by the…EasySingle correct
6 Apr 2026, Shift 1 · Q32A smooth inclined plane ends in a vertical circular loop, as shown in the figure. A small body is released from height $h$ as shown. If…MediumSingle correctHas a figure
6 Apr 2026, Shift 2 · Q29A body of mass 1 kg moves along a straight line with a velocity $v=2x^2$ . The work done by the body during displacement from $x=0$ to 5 m…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 42 of the 174 JEE Main shifts held from 2017 to 2026.