Gce Model Questions Vol1 2025 Physics Question 5

Practice essay / theory question 5 from the 2025 Gce Model Questions Vol1 Physics examination. This question covers Work, Energy, Power, Friction, Inclined planes .

Gce Model Questions Vol1 2025 Physics Essay / Theory
Topics: Work Energy Power Friction Inclined planes
Question 5 GCE_MODEL_QUESTIONS_VOL1 • 2025 • PHYSICS • essay

A 12.0 kg block is released from rest at the top of a 5.0 m long incline that makes an angle of 20° with the horizontal. The first 3.0 m of the incline is smooth, after which the block encounters a rough section of length 2.0 m. The coefficient of kinetic friction on the rough section is unknown. The block just reaches the bottom of the incline with zero speed. The block is then pulled back up the same incline at constant speed by a horizontal force of 80 N applied via a light rope over a friction‑free pulley.

Question Parts

( a )
Determine the coefficient of kinetic friction on the rough section of the incline.
( b )
Calculate the work done by the horizontal pull force in pulling the block back up to its original position.
( c )
If the ascent takes 10.0 s, determine the average power supplied by the pull force.

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About This Question

This is Gce Model Questions Vol1 2025 Physics Question 5. It is one of the essay questions from the 2025 Gce Model Questions Vol1 Physics examination.

The question covers Work, Energy, Power, Friction, Inclined planes .

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