Gce Model Questions Vol1 2023 Physics Question 5

Practice objective / multiple choice question 5 from the 2023 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2023 Physics Objective / Multiple Choice Medium Difficulty
Question 5 GCE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

A block of mass \(8.0\ \text{kg}\) rests on a rough inclined plane that makes an angle of \(30^{\circ}\) with the horizontal. The coefficient of static friction is 0.40 and the coefficient of kinetic friction is 0.30. A horizontal force \(F\) is applied to the block, pushing it up the incline. (a) Determine the minimum magnitude of \(F\) required to start the block moving up the plane. (b) Using this value of \(F\), calculate the block's acceleration up the plane once it is moving, assuming kinetic friction. Give \(F\) in newtons (to one decimal place) and the acceleration in \(\text{m s}^{-2}\) (to two decimal places).

Answer Options

A. Minimum \(F\) ≈ 85.3 N; acceleration ≈ 0.92 m s⁻² up the plane
B. Minimum \(F\) ≈ 99.7 N; acceleration ≈ 2.30 m s⁻² up the plane
Correct Answer C. Minimum \(F\) ≈ 99.7 N; acceleration ≈ 1.48 m s⁻² up the plane
D. Minimum \(F\) ≈ 112.5 N; acceleration ≈ 2.10 m s⁻² up the plane
Correct Answer
C
Correct Option:
Minimum \(F\) ≈ 99.7 N; acceleration ≈ 1.48 m s⁻² up the plane

About This Question

This is Gce Model Questions Vol1 2023 Physics Question 5. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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