Question

1. if a pendulum is displaced 18cm from its rest position, what is the amplitude?

38cm
\\(\frac{1}{18}\\)cm
-18cm
18cm

Explanation:

Amplitude is defined as the maximum displacement of an oscillating object from its rest (equilibrium) position. Since the pendulum is displaced 18cm from rest, this value equals the amplitude, and amplitude is a positive scalar quantity representing magnitude, so negative values or unrelated values do not apply here.

Answer:

18cm