Gce Model Questions Vol1 2025 Physics Question 34

Practice objective / multiple choice question 34 from the 2025 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2025 Physics Objective / Multiple Choice Medium Difficulty
Question 34 GCE_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • objective

A block of mass 8 kg rests on a rough inclined plane that makes an angle of 30^{\circ} with the horizontal. The coefficient of static friction between the block and the plane is \(\mu_s\). A horizontal force \(F\) of magnitude 40 N is applied to the block (directed horizontally). (i) If this force is just sufficient to start moving the block up the incline, find \(\mu_s\). (ii) Assuming the coefficient of kinetic friction is \(\mu_k = 0.8\,\mu_s\), calculate the acceleration of the block when the same 40 N force is maintained and the block moves up the plane.

Answer Options

A. μ_s ≈ 0.12; acceleration ≈ 0.55 m s^{-2}
B. μ_s ≈ 0.20; acceleration ≈ 0.25 m s^{-2}
Correct Answer C. μ_s ≈ 0.16; acceleration ≈ 0.40 m s^{-2}
D. μ_s ≈ 0.18; acceleration ≈ 0.30 m s^{-2}
Correct Answer
C
Correct Option:
μ_s ≈ 0.16; acceleration ≈ 0.40 m s^{-2}

About This Question

This is Gce Model Questions Vol1 2025 Physics Question 34. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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