Gce Model Questions Vol1 2018 Physics Question 23

Practice objective / multiple choice question 23 from the 2018 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2018 Physics Objective / Multiple Choice Medium Difficulty
Question 23 GCE_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • objective

A block of mass \(5.0\ \text{kg}\) rests on a rough inclined plane that makes an angle of \(30^{\circ}\) with the horizontal. The coefficients of static and kinetic friction are \(\mu_{s}=0.40\) and \(\mu_{k}=0.30\) respectively. A horizontal force \(F\) is applied to the block.\n\n(i) Determine the minimum magnitude of \(F\) required to start the block moving up the incline.\n\n(ii) If the applied horizontal force is increased to \(70\ \text{N}\), find the acceleration of the block up the plane once it is in motion.

Answer Options

A. F_{min} \approx 6.2\times10^{1}\ \text{N}, \; a \approx 1.8\ \text{m\,s}^{-2} (for F=70\ \text{N})
Correct Answer B. F_{min} \approx 6.2\times10^{1}\ \text{N}, \; a \approx 2.6\ \text{m\,s}^{-2} (for F=70\ \text{N})
C. F_{min} \approx 7.0\times10^{1}\ \text{N}, \; a \approx 2.0\ \text{m\,s}^{-2} (for F=70\ \text{N})
D. F_{min} \approx 5.4\times10^{1}\ \text{N}, \; a \approx 3.0\ \text{m\,s}^{-2} (for F=70\ \text{N})
Correct Answer
B
Correct Option:
F_{min} \approx 6.2\times10^{1}\ \text{N}, \; a \approx 2.6\ \text{m\,s}^{-2} (for F=70\ \text{N})

About This Question

This is Gce Model Questions Vol1 2018 Physics Question 23. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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