Friction, Circular Motion, Momentum And Properties Of Waves And Sound

Question 1

What is the definition of friction?

Answer 1

Friction is the resistance to motion of one object moving relative to another.

Question 2

True or False: Friction always acts in the direction of motion.

Answer 2

False

Question 3

What are the two main types of friction?

Answer 3

Static friction and kinetic friction.

Question 4

Fill in the blank: The force of friction is directly proportional to the ______ between the surfaces in contact.

Answer 4

normal force

Question 5

What is circular motion?

Answer 5

Circular motion is the movement of an object along the circumference of a circle.

Question 6

What is centripetal force?

Answer 6

Centripetal force is the net force that acts on an object moving in a circular path, directed towards the center of the circle.

Question 7

True or False: An object in circular motion is always accelerating.

Answer 7

True

Question 8

What is momentum?

Answer 8

Momentum is the product of an object’s mass and its velocity.

Question 9

How is momentum calculated?

Answer 9

Momentum is calculated using the formula p = mv, where p is momentum, m is mass, and v is velocity.

Question 10

What is the law of conservation of momentum?

Answer 10

The law of conservation of momentum states that the total momentum of a closed system remains constant over time.

Question 11

Fill in the blank: Waves transfer ______ through a medium.

Answer 11

energy

Question 12

What are the two main types of waves?

Answer 12

Transverse waves and longitudinal waves.

Question 13

True or False: Sound waves are longitudinal waves.

Answer 13

True

Question 14

What is the frequency of a wave?

Answer 14

Frequency is the number of complete wave cycles that pass a point in one second.

Question 15

What unit is frequency measured in?

Answer 15

Hertz (Hz)

Question 16

What is wavelength?

Answer 16

Wavelength is the distance between two consecutive points in phase on a wave.

Question 17

Fill in the blank: The speed of sound in air is approximately ______ meters per second.

Answer 17

343

Question 18

What is amplitude in the context of waves?

Answer 18

Amplitude is the maximum displacement of points on a wave from its rest position.

Question 19

True or False: Higher amplitude waves carry more energy.

Answer 19

True

Question 20

What is the relationship between frequency and wavelength?

Answer 20

Frequency and wavelength are inversely related; as one increases, the other decreases.

Question 21

What phenomenon occurs when sound waves encounter a barrier?

Answer 21

Reflection

Question 22

What is refraction?

Answer 22

Refraction is the bending of waves as they pass from one medium to another.

Question 23

Fill in the blank: The speed of sound is faster in ______ than in air.

Answer 23

water

Question 24

What is the Doppler effect?

Answer 24

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.

Question 25

True or False: Sound travels faster in solids than in liquids.

Answer 25

True

Question 26

What is the term for the lowest frequency of a wave in a standing wave pattern?

Answer 26

Fundamental frequency

Question 27

What is the unit of measurement for sound intensity?

Answer 27

Decibel (dB)

Question 28

Fill in the blank: The phenomenon of sound bending around obstacles is called ______.

Answer 28

diffraction

Question 29

What is the principle of superposition in wave theory?

Answer 29

The principle of superposition states that when two or more waves overlap, the resulting wave is the sum of the individual waves.

Question 30

What type of wave is characterized by particle displacement being parallel to wave direction?

Answer 30

Longitudinal wave