Resonance

Which of the following is not an example of harmonic motion?

• a ball rolling down a hill

• the movement of a jackhammer breaking concrete

• a swinging pendulum

• waves in a pond spreading outward from a dropped stone

What is the best choice of equipment to measure the period of oscillation of a pendulum?

• your heartbeat

• a meter stick

• a triple beam balance

• a stopwatch

• a spring

The picture shows an oscillating mass. The green line is the equilibrium line and the red line indicates the trough. What is the amplitude?

• 15 cm

• 10 cm

• 25 cm

• 50 cm

Tags

NGSS.MS-PS4-1

The position of an oscillating mass is graphed here as a function of time. Which quantity is changing as time passes?

• period

• frequency

• amplitude

• none of these

Tags

NGSS.HS-PS4-1

Systems may exhibit an extra large-amplitude response when a force is added that _____.

• matches the total energy of the system

• matches its natural frequency

• equals the lowest frequency

• equals the highest frequency

When the frequency of an added force matches a system's natural frequency, producing a large oscillation.

• periodic damping

• amplitude

• fluctuation

• resonance

Tags

NGSS.HS-PS4-1

The frequency at which a system tends to oscillate.

• frequency system

• periodic frequency

• amplified frequency

• natural frequency

Tags

NGSS.HS-PS4-1

How does increasing inertia affect an oscillating system?

• lowers the natural frequency

• raises the natural frequency

What variables affect the period of a pendulum?

• Mass and Length of the string

• Frequency and Resonance

• Temperature and Amplitude

• Gravity and the Length of the string

A force that repeats in cycles.

• energy accumulator

• amplitude

• periodic force

• frequency force