Neco Model Questions Vol1 2020 Physics Question 5

Practice essay / theory question 5 from the 2020 Neco Model Questions Vol1 Physics examination. This question covers work, energy, kinetic friction, inclined plane .

Neco Model Questions Vol1 2020 Physics Essay / Theory
Topics: work energy kinetic friction inclined plane
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • essay

A 5.0 kg block is pulled up a rough inclined plane that is 8.0 m long and makes an angle of 30° with the horizontal. The block is attached to a rope that makes an angle of 20° above the plane. The magnitude of the pulling force varies linearly from 30 N at the bottom of the plane to 50 N at the top. The coefficient of kinetic friction between the block and the plane is 0.20. The diagram below shows the arrangement.

Question Parts

( a )
Derive an expression for the net work done on the block after it has moved a distance \(x\) up the plane (\(0 \le x \le 8\) m). Show the steps you use.
( b )
Calculate the total work done by the pulling force over the whole 8.0 m incline.
( c )
Determine the total work done against kinetic friction over the whole incline.
( d )
Using the work‑energy theorem, find the speed of the block at the top of the incline. The block starts from rest.
( e )
Answer the following:
( ) If the coefficient of kinetic friction were zero, what would be the final speed of the block at the top?

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Neco Model Questions Vol1 2020 Physics Question 5. It is one of the essay questions from the 2020 Neco Model Questions Vol1 Physics examination.

The question covers work, energy, kinetic friction, inclined plane .

View More Neco Model Questions Vol1 2020 Physics Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support