Periodic Motion

Multiple Choice

What comes to mind when we see them?

• Water

• Waves

• Repetition

• Eye-catching

Multiple Choice

Waves that require a medium to travel are called ___ while waves that can travel through a vacuum are called ___.

• Mechanical waves; Electromagnetic waves

• Electromagnetic waves; Mechanical waves

Multiple Choice

___ is to highest point of a transverse waves as ___ is to lowest point of a transverse wave.

• crest, trough

• trough, crest

• amplitude, period

• period, amplitude

Multiple Choice

What do you call the highest energy parts of a longitudinal wave where the loops are bunched together?

• compression

• rarefaction

• amplitude

• crest

Multiple Choice

If the Period (T) of a wave has a unit of seconds, what will be the unit of frequency if it is the reciprocal of the period?

• seconds

• s^2

• 1/s

Multiple Choice

Shown in the picture are two waves. Name the two wave types from top to bottom.

• longitudinal, translational

• translational, longitudinal

• transverse, longitudinal

• longitudinal, transverse

Multiple Choice

If sound needs a medium to propagate, what type of wave is it?

• Magnetic

• Electromagnetic

• Mechanical

Multiple Choice

If you and your classmates were inside the classroom and you shouted all at the same time, what type of interference will you be able to achieve?

• Constructive

• Destructive

Multiple Choice

Suppose that you were using a noise cancelling headphone, what type of interference does it apply?

• Constructive

• Destructive

​https://youtu.be/2eBW3NOqQiQ

​https://youtu.be/2eBW3NOqQiQ

Multiple Choice

What do you call the combination of in-phase and out-of-phase waves which creates a pattern of pulsating motion/sound?

• Tempo

• Rhythm

• Beats

• Sound

​https://youtu.be/-k2TuJfNQ9s

​https://youtu.be/ieheeeKTbac

Multiple Choice

Suppose that you witnessed the second harmonic being exhibited, describe the number of nodes and antinodes it has respectively.

• 3 and 2

• 2 and 3

• 1 and 2

• 2 and 1

​https://youtu.be/Ur3F-JLdq_Q

Multiple Choice

Suppose that you were on the road when an ambulance is approaching. Describe the sound you expect it to make as it approaches you.

• Deep and low pitched

• High pitched

• Loud and obnoxious

• Insufficient data

​https://youtu.be/tIBefIRqg_E

Multiple Choice

Why is it recommended for us to not play music using ear phones in maximum volume setting?

• High sound intensity is negligible

• Sound intensity is a ratio of power over area

• High sound intensity may cause hearing loss

• Moving away reduces the intensity of sound

Multiple Choice

Describe the typical ideal music characteristic

• Has a pattern and repeating beat

• Loud and unpredictable

• No rhythm

Multiple Choice

If the displacement is moving to the right, where will the restoring force be directed to?

• Down

• Right

• Up

• Left

Multiple Choice

Why is the velocity maximum and acceleration zero in the equilibrium position of a mass spring system?

• Acceleration can still increase thus the object speeds up

• Acceleration is at its max thus it can no longer accerlerate anymore and velocity is already at its peak at that moment

• Acceleration has no effect on the velocity

Multiple Choice

As you have seen from the image, the pendulum is at its highest position on the two ends of the swinging motion (left and right). Where will the GPE be max in the pendulum's motion?

• At the equilibrium position

• Ends (left and right)

• Halfway through each swing

Multiple Choice

You were observing a cube fall down while it is attached to a spring. It bounced back and forth. What type of damping took place?

• Underdamped

• Overdamped

• Critically damped

Multiple Choice

((1^2) (9.8))/ 4pi^2 =

• 0.15 m

• 0.20 m

• 0.25 m

• 0.30 m

Multiple Choice

((4pi^2) (0.25))/0.20^2

• 24.7 N/m

• 34.7 N/m

• 24.5 N/m

• 34.5 N/m