Question 8
WAEC
•
2023
•
PHYSICS
•
essay
Question Parts
(
a
)
(i) State the reason why simple harmonic motion is periodic.
(
a
)
(ii) State two factors that affect the period of oscillation of a simple pendulum.
(
a
)
(iii) Sketch a graph of the total mechanical energy, \( \mathbf{E} \), against displacement, \( y \), for the motion of a simple pendulum from one extreme position to the other.
(
b
)
The diagram below illustrates an oscillatory pendulum. Calculate the work done in raising the pendulum to point B, if the mass of the bob is \( 50 \mathrm{~g} .\left[g=10 m s^{-2}\right] \).
(
c
)
A spiral spring of spring constant, \( k \), and natural length, \( l \), has a scale pan of mass \( 0.04 k g \) hanging on its lower end while the upper end is firmly fixed to a support. When an object of mass 0.20 kg is placed on the scale pan, the length of the spring becomes \( 0.055 m \) and when the object is replaced with another object of mass 0.28 kg, the length of the spring becomes 0.6 m. Calculate the values of \( k \) and \( l \). \( [g=10 \left.m s^{-2}\right] \).
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About This Question
This is
Waec
2023
Physics
Question 8.
It is one of the
essay
questions from the
2023
Waec
Physics
examination.
The question covers
General
.
