JEE Main 2023PhysicsLaws of MotionEasyMCQ

JEE Main 2023 — Laws of Motion Question with Solution

JEE Main 2023 (30 Jan Shift 2)

Question

A block of 3 kg is attached to a string whose other end is attached to the wall. An unknown force F is applied so that the string makes an angle of 30° with the wall. The tension T is : (Given g =10 m s–2)

Choose an option

Show full solutionCorrect option: A
Correct answer
A20 N

Step-by-step explanation

From geometry, θ=30°.

For equilibrium,

Tcosθ=mg

⇒T=mgcos30°⇒T=3×1032

⇒T=20 N

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About this question

This is a previous-year question from JEE Main 2023, covering the Laws of Motion chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.