આકૃતિમાં દર્શાવ્યા પ્રમાણે ઢળતા સમતલ પર (\(45^{\circ}\) પર ઢળતા) બ્લોકને ધ્યાનમાં લો. જો ઢાળ પર ઉપરની તરફ ધકેલવા માટેનું બળ તેને સરકતો અટકાવવા માટેના બળ કરતાં બમણું હોય તો બ્લોક અને ઢાળના સમતલ વચ્યેનો ધર્ષણાંક \((\mu)\) બરાબર \(.......\) હોય.

A \(0.33\)
B \(0.60\)
C \(0.25\)
D \(0.50\)

Verified Solution

Answer & Solution

Correct Answer

(A) \(0.33\)

Step-by-step Solution

Detailed explanation

\(F _1= mg \sin 45^{\circ}+ f = mg \sin 45^{\circ}+\mu N\) \(F _1=\frac{ mg }{\sqrt{2}}+\mu mg \cos 45^{\circ}\) \(F _1=\frac{ mg }{\sqrt{2}}(1+\mu)\) \(F _2= mg \sin 45^{\circ}- f = mg \sin 45^{\circ}-\mu N\) \(=\frac{ mg }{\sqrt{2}}(1-\mu)\) \(F _1=2 F _2\)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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