Test Index

WAEC Physics 2018 Paper

Question : 17

Total: 50

Solution:

Concept:

Frequency is the number of complete oscillations per second, and it is the reciprocal of the period.

Explanation:

The pendulum makes 10 oscillations in 8.0s.

Time for 1 complete oscillation is the period:

T = \frac{8.0}{10} = 0.8\,\text{s}

Frequency is given by:

f = \frac{1}{T} = \frac{1}{0.8} = 1.25\,\text{Hz}

Answer:

The correct option is B. 1.25Hz.

Go to Question:

Prev Question

Next Question