Waec Model Questions Vol1 2019 Physics Question 4

Practice practical question 4 from the 2019 Waec Model Questions Vol1 Physics examination. This question covers Forces .

Waec Model Questions Vol1 2019 Physics Practical

Topic: Forces

Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • PHYSICS • practical

A student investigates Hooke’s law using a spring. Masses are hung from the spring and the corresponding extensions are recorded as follows: | Mass (kg) | Extension (cm) | |-----------|----------------| | 0.05 | 1.2 | | 0.10 | 2.4 | | 0.15 | 3.5 | | 0.20 | 4.7 | | 0.25 | 5.9 | The spring is assumed to obey F = kx. The student must determine the spring constant and use it to find the elastic potential energy for a 6.0 cm extension.

Question Parts

( a )

Calculate the force exerted by each mass (use g = 9.8 m s⁻²).

( b )

Plot the force (N) against extension (m). Using the first and last data points, determine the spring constant k (gradient of the straight line). Give k to the nearest whole N m⁻¹.

( c )

Using the obtained k, calculate the elastic potential energy stored when the spring is extended by 6.0 cm. Express the answer in joules to three significant figures.

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About This Question

This is Waec Model Questions Vol1 2019 Physics Question 4. It is one of the practical questions from the 2019 Waec Model Questions Vol1 Physics examination.

The question covers Forces .

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