Frequency and Period

True or False: The time for a complete back-and-forth swing of a pendulum is its frequency.

• True

• False

The number of cycles that are completed per second is called the ________ and is measured in _________.

• frequency, Hertz

• wavelength, meters

• amplitude, meters

• period, seconds

What variable affects the period of the pendulum?  

• Amplitude
• Mass
• String length
• All variables (amplitude, mass, and string length)

The period of a pendulum may be decreased by

• Increasing the mass of the bob

• increasing the length of pendulum

• decreasing the mass of the bob

• shortening the length of pendulum

The period of a pendulum is 10 s. What is its frequency?

• 10 Hz

• 1 Hz

• 0.5 Hz

• 0.1 Hz

Frieda the fly flaps her wings back and forth 100 times each second.  The period of her wings flapping is:

• 100 s
• 0.01 s
• 0.01 Hz
• 100 Hz

A tennis coach paces back and forth along the sideline 10 times in 60 seconds.  The frequency of her pacing is:

• 0.167 Hz
• 6.0 Hz
• 0.167 s
• 6.0 s

Tags

NGSS.HS-PS4-1

A pendulum makes 33 complete back and forth cycles of vibration in 11 seconds. Its period is

• 3.0 s

• 3.0 Hz

• 0.33 s

• 0.33 Hz

A pendulum makes 33 complete back and forth cycles of vibration in 11 seconds.  It's frequency is:

• 3.0 s
• 3.0 Hz
• 0.33 s
• 0.33 Hz

A boy notices that 45 complete waves travel past him in ninety seconds.  What is the frequency of these water waves?

• 100 m
• 1 Hz
• 0.5 Hz
• 1m/s

Tags

NGSS.HS-PS4-1