A particle placed inside a hollow sphere of radius r with a friction coefficient of -rr can remain stationary up to what maximum height?

Strength of Materials MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Strength of Materialscivil-engineering-mcqs › strength-of-materials
Published
15 Jan 2019
Last updated
28 May 2026

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Explanation

Given the coefficient of friction as -rr, the particle can stay at rest inside the hollow sphere only up to a height of about 0.134 times the radius. Other values like r/2, r/A, r/%, and 3r/8 do not satisfy the equilibrium condition under the given friction.

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