Waec Model Questions Vol1 2018 Physics Question 4

Practice practical question 4 from the 2018 Waec Model Questions Vol1 Physics examination. This question covers Forces .

Waec Model Questions Vol1 2018 Physics Practical
Topic: Forces
Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • practical

A wooden block of mass 0.800 kg rests on a horizontal wooden table. The coefficient of static friction (μ_s) is to be determined using an inclined plane, and the coefficient of kinetic friction (μ_k) is to be obtained by pulling the block with a spring balance on the horizontal table.

Question Parts

( a )
The block is placed on an adjustable wooden incline. The angle of the plane is slowly increased until the block just begins to slide. The angle measured at the onset of motion is 30.0°. Calculate the coefficient of static friction μ_s.
( b )
The block is returned to the horizontal table. A spring balance is attached to the block and pulled at constant speed. The reading on the spring balance required to maintain uniform motion is 4.50 N. Determine the coefficient of kinetic friction μ_k.
( c )
Calculate the percentage difference between μ_s and μ_k and state which coefficient is larger.
( d )
Suggest two possible sources of error that could affect the determination of μ_s and μ_k and propose a method to minimise each error.

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About This Question

This is Waec Model Questions Vol1 2018 Physics Question 4. It is one of the practical questions from the 2018 Waec Model Questions Vol1 Physics examination.

The question covers Forces .

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