Physics Test 1

Question 1

What does T stand for in the following formula: F = 1/T

Answer 1

T stands for period

Question 2

What does P stand for in the following formula: p = mv

Answer 2

P stands for momentum

Question 3

What is the definition of the period and how do you find it in a wave?

Answer 3

The period is the time taken for one wave to pass a point. To find it you measure the distance between two consecutive waves.

Question 4

Where are rarefactions located?

Answer 4

Rarefactions are located in between two compressions.

Question 5

What type of waves are seismic waves?

Answer 5

They are both since rock material is pushed and pulled (longitudinal)
And moved up or down , side to side (transverse)

Question 6

what is the law of conservation of momentum?

Answer 6

Total p before = Total p after

Question 7

Formula for stopping distance ?

Answer 7

stopping distance = thinking distance + breaking distance

Question 8

What is reaction time?

Answer 8

Time between a person detecting stimuli and reacting

Question 9

What affects reaction time?

Answer 9

reaction time is affected by drugs , distraction and alcohol

Question 10

What affects breaking time?

Answer 10

Breaking distance is affected by Friction , brakes

Question 11

When kinetic energy is transferred by the braking force (friction) it’s released through …. and …… . Fill in the missing words

Answer 11

Heat and Sound

Question 12

What is the formula for Force?

Answer 12

mv - mu / t

Question 13

What is Frequency and how do you find it?

Answer 13

Frequency is the number of waves passing each second. F = 1/T

Question 14

How do you find the amplitude and in what units of length are they measured in?

Answer 14

To find the amplitude you measure the height of the wave from its resting point, measured in meters

Question 15

What is the formula for Work done?

Answer 15

work done (J) = force (N) x Distance moved in the direction of the force (M)

Question 16

What are two safety feature that modern cars use to help reduce the force on the occupants in a collision?

Answer 16

Crumble zone , Air bags

Question 17

How do Crumble zones work?

Answer 17

The same force is spread out over a longer period, resulting in a smaller force acting on the vehicle and, consequently, the passengers.

Question 18

What type of waves are sound waves?

Answer 18

Longitudinal

Question 19

What is frequency measured in?

Answer 19

Hertz (Hz)

Question 20

If we have a frequency of 1 hertz what does this mean?

Answer 20

A frequency of 1 hertz means 1 wave passing per second

Question 21

How does frequency change Sound and Light waves?

Answer 21

For sound, the wave frequency determines the pitch(how high or low it sound) and for light the frequency determines the color.

Question 22

How is wavelength measured and in what units of length?

Answer 22

The wavelength of a wave is the distance from a point on one wave to a point in the same position on the next wave , measure in meters.

Question 22

How does change in the amplitude affect a sound wave?

Answer 22

The greater the amplitude of a sound wave, the louder is sounds

Question 23

Tell me one way the velocity of a wave is affected?

Answer 23

Waves travel at different speeds in different materials

Question 24

What is the equation that links frequency , wavelength and velocity?

Answer 24

Velocity (m/s) = frequency (Hz) x Wavelength(m)

Question 25

What is the speed which light is always travelling at

Answer 25

300 000 000 m/s or 3x10 to the power of 8