Friction, Circular Motion, Momentum And Properties Of Waves And Sound Flashcards
What is the definition of friction?
Friction is the resistance to motion of one object moving relative to another.
True or False: Friction always acts in the direction of motion.
False
What are the two main types of friction?
Static friction and kinetic friction.
Fill in the blank: The force of friction is directly proportional to the ______ between the surfaces in contact.
normal force
What is circular motion?
Circular motion is the movement of an object along the circumference of a circle.
What is centripetal force?
Centripetal force is the net force that acts on an object moving in a circular path, directed towards the center of the circle.
True or False: An object in circular motion is always accelerating.
True
What is momentum?
Momentum is the product of an object’s mass and its velocity.
How is momentum calculated?
Momentum is calculated using the formula p = mv, where p is momentum, m is mass, and v is velocity.
What is the law of conservation of momentum?
The law of conservation of momentum states that the total momentum of a closed system remains constant over time.
Fill in the blank: Waves transfer ______ through a medium.
energy
What are the two main types of waves?
Transverse waves and longitudinal waves.
True or False: Sound waves are longitudinal waves.
True
What is the frequency of a wave?
Frequency is the number of complete wave cycles that pass a point in one second.
What unit is frequency measured in?
Hertz (Hz)
What is wavelength?
Wavelength is the distance between two consecutive points in phase on a wave.
Fill in the blank: The speed of sound in air is approximately ______ meters per second.
343
What is amplitude in the context of waves?
Amplitude is the maximum displacement of points on a wave from its rest position.
True or False: Higher amplitude waves carry more energy.
True
What is the relationship between frequency and wavelength?
Frequency and wavelength are inversely related; as one increases, the other decreases.
What phenomenon occurs when sound waves encounter a barrier?
Reflection
What is refraction?
Refraction is the bending of waves as they pass from one medium to another.
Fill in the blank: The speed of sound is faster in ______ than in air.
water
What is the Doppler effect?
The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave.
True or False: Sound travels faster in solids than in liquids.
True
What is the term for the lowest frequency of a wave in a standing wave pattern?
Fundamental frequency
What is the unit of measurement for sound intensity?
Decibel (dB)
Fill in the blank: The phenomenon of sound bending around obstacles is called ______.
diffraction
What is the principle of superposition in wave theory?
The principle of superposition states that when two or more waves overlap, the resulting wave is the sum of the individual waves.
What type of wave is characterized by particle displacement being parallel to wave direction?
Longitudinal wave
