JEE Main 2019PhysicsLaws of MotionMediumMCQ

JEE Main 2019 — Laws of Motion Question with Solution

JEE Main 2019 (12 Jan Shift 2)

Question

A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force 2N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10N. The coefficient of static friction between the block and the plane is: [Take g=10 m/s2 ]

Choose an option

Show full solutionCorrect option: D
Correct answer
D32

Step-by-step explanation

2+mgsin⁡θ=μ mgcos⁡θ

mgsin⁡θ-μ mgcos⁡θ=2 ........1
mgsin⁡θ+ μ mgcos⁡θ=10 .......2

equation (1) devided by (2)

mg sin⁡θ-μcos⁡θmg sin⁡θ+ μcos⁡θ=-210=-15 

1-μ35=-1+μ3

6=43 μ

μ=32

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About this question

This is a previous-year question from JEE Main 2019, 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.