JEE Main 2019 — Laws Of Motion Question with Solution
From: JEE Main 2019 (Online) 12th January Evening Slot
Question
A block kept on a rough inclined plane, as shown in the figure, remains at rest upto a maximum force 2 N down the inclined plane. The maximum external force up the inclined plane that does not move the block is 10 N. The coefficient of static friction between the block and the plane is : [Take g = 10 m/s2]
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
2 + mg sin30 = mg cos30o
10 = mgsin30 + mg cos30o
= 2mg cos30 2
6 = mg cos30
4 = mg sin30
=
10 = mgsin30 + mg cos30o
= 2mg cos30 2
6 = mg cos30
4 = mg sin30
=
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