Neco Model Questions Vol1 2017 Physics Question 4

Practice essay / theory question 4 from the 2017 Neco Model Questions Vol1 Physics examination. This question covers forces, inclined plane, static friction, kinetic friction, work and energy .

Neco Model Questions Vol1 2017 Physics Essay / Theory
Topics: forces inclined plane static friction kinetic friction work and energy
Question 4 NECO_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • essay

A 5.0 kg wooden crate rests on a rough inclined plane that makes an angle of 30° with the horizontal. The plane is 2.0 m long. The coefficient of static friction between the crate and the plane is 0.30 and the coefficient of kinetic friction is 0.25. A horizontal force \(F\) is applied to the crate at a point 0.40 m above the surface of the plane, as shown in the diagram.

Question Parts

( a )
Resolve the weight of the crate into components parallel and perpendicular to the plane. State their numerical values (use \(g = 9.8\,\text{m s}^{-2}\)).
( b )
Determine the minimum magnitude of the horizontal force \(F\) required to start moving the crate up the plane. Show all steps.
( c )
If the horizontal force is increased to \(F = 80\,\text{N}\), calculate the acceleration of the crate up the plane (assume it is already moving).

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About This Question

This is Neco Model Questions Vol1 2017 Physics Question 4. It is one of the essay questions from the 2017 Neco Model Questions Vol1 Physics examination.

The question covers forces, inclined plane, static friction, kinetic friction, work and energy .

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