Harmonic oscillations
Answers are for parents and teachers.
1
A pendulum makes 90 full oscillations in 1 minute (60 s). What is the frequency (Hz)?
1.5
2
If the frequency is 50 Hz, what is the period (s)? (give a decimal)
0.02
3
x = 0.2 sin(3t) (m). What is the velocity amplitude (m/s)? (Aω)
0.6
4
A = 0.05 m, ω = 20 rad/s. What is the acceleration amplitude (m/s²)? (Aω²)
20
5
Why do free oscillations die out with time?
Friction and resistance turn the energy into heat.