Waves & Sound
What is being transferred with a wave?
Energy
The greater the frequency the ______ the pitch.
The higher the pitch.
An object with a net force of 0 N. Can it still accelerate?
No
Which law explains how seatbelts work?
Newton's first law of motion
Balanced or Unbalanced forces: A rocket taking off
unbalanced
Increasing the amplitude means increasing the ______ of a wave.
Energy
Which wave property makes light different from mechanical waves?
The ability to travel without a medium
Tasha runs 10 blocks north, then 4 blocks back south. What's her displacement? Be careful, I need the full answer.
6 blocks north
Action and reaction forces are apart of Newtons ___ law.
Third law
Scalar or vector? Speed, velocity, distance, displacement
Scalar, vector, scalar, vector
All of the following can travel without a medium EXCEPT:
A) Visible light B) Gamma rays C) Infrared D) Sound
D) Sound
What wave behavior is shown by a pencil appearing “broken” in water?
Refraction
A baseball player runs all bases (25 m between each base) and returns to home. What's his Distance? What's his Displacement?
Distance: 100 m
Displacement: 0 m
What is inertia?
Object's resistance to a change in motion
Explain how energy is conserved through a moving pendulum. Discuss how potential and kinetic energy change and each position of the pendulum
Answers will vary
Explain how the doppler effect works and tell me why people experience different sounds depending on where they are. I am looking for very specific key words.
As the object moves closer to a person, the wavelength is shorter and there is a higher pitch. As the object moves farther away, the wavelength gets longer and there is a lower pitch.
What is the potential energy of a 40 kg object on earth sitting on a shelf that is 10 m high? Include units in your answer
3,920 J
What does a horizontal (flat) line mean on a Velocity v. Time Graph?
It means the object is at rest
Give a real life example of each of the three Newton's laws of motion. State which example goes with each law.
Answers will vary
What is the momentum of a 37 kg object moving at 26 m/s?
Momentum= mass x velocity
962 kg.m/s
Match each wave behavior to the name of the interaction:
Goes around = ___; Bounces = ___; Bends = ___
Diffraction, Reflection, Refraction
What is the wavelength of a light wave traveling at 66m/s and has a frequency of 23 Hz.
2.86 m
What is the acceleration of a 50 kg object pushed with a force of 500 newtons? Include the correct units.
10 m/s^2
A 300 kg object accelerates at 4 m/s². What force was applied?
Force= mass x acceleration
1,200 N
What is the acceleration of car slowing from 24 m/s to 15 m/s in 12 sec?
(final velocity- initial velocity)/ time= acceleration
-0.75 m/s^2