A 2 kg brick begins to slide over a surface which is inclined at an angle of 45° with respect to horizontal axis. The co-efficient of static friction between their surfaces is: (a) 1 (b) 1.7 (c) 0.5 (d) 1/√(3)

Answer: (a). The brick just begins to slide at the angle of repose: μs = tan θ. μs = tan 45° = 1 So the answer is (a) 1.

A 2 kg brick begins to slide over a surface which is inclined at an… | JEE Main 2024 (4 Apr, Shift 2)

Q7JEE Main 2024 · 4 APR · SHIFT 2Easy

Friction on an Incline

A $2\text{ kg}$ brick begins to slide over a surface which is inclined at an angle of $45^\circ$ with respect to horizontal axis. The co-efficient of static friction between their surfaces is:

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Answer: (a)

The brick just begins to slide at the angle of repose: $\mu_s = \tan\theta$ .
$\mu_s = \tan 45^\circ = 1$
So the answer is (a) 1.

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