Waec Model Questions Vol1 2021 Physics Question 5

Practice essay / theory question 5 from the 2021 Waec Model Questions Vol1 Physics examination. This question covers Work, Energy, Power, Inclined plane .

Waec Model Questions Vol1 2021 Physics Essay / Theory

Topics: Work Energy Power Inclined plane

Question 5 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • essay

A 12.0 kg crate is pulled up a smooth inclined plane that makes an angle of 30° with the horizontal. The pulling force is applied parallel to the plane and varies with the distance s (in metres) from the bottom according to \(F = (50 + 5s)\) N. The crate starts from rest at the bottom and reaches the top after moving 8.0 m.

Question Parts

( a )

Calculate the total work done by the pulling force during the ascent.

( b )

Determine the kinetic energy of the crate at the top of the incline. (Assume no friction.)

( c )

The crate is then released from rest at the top and allowed to slide down the same incline under the action of gravity alone. It reaches the bottom in 4.0 s. Find the average power delivered by gravity during this descent.

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 Waec Model Questions Vol1 2021 Physics Question 5. It is one of the essay questions from the 2021 Waec Model Questions Vol1 Physics examination.

The question covers Work, Energy, Power, Inclined plane .

View More Waec Model Questions Vol1 2021 Physics Questions More Waec 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