JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 13 April 2023, Shift 2, Physics Q32

Question 32 of 90 in this shift, Physics question 2 of 30, Section A.

The distance travelled by an object in time t is given by

s=(2.5)t^2

. The instantaneous speed of the object at

t=5

s will be:

(1) $5\ \mathrm{ms^{-1}}$
(2) $12.5\ \mathrm{ms^{-1}}$
(3) $25\ \mathrm{ms^{-1}}$ Official answer
(4) $62.5\ \mathrm{ms^{-1}}$

Official answer

Option 3

NTA final key.

Chapter: Motion in a Straight Line
Topic: Kinematics in 1D
Idea tested: Average vs Instantaneous Velocity

Same idea in other shifts

Asked 3× in all

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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.