Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics Y9 Revision > Physics Revision > Flashcards

Physics Revision Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is Scalar?

A

A physical quantity that can be fully describe with a magnitude only.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is Vector?

A

A physical quantity that can be fully described with a magnitude and direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is an example of scalar?
(Name two examples)

A

Distance ,voltage ,energy ,time ,temperature ,speed ,mass ,frequency or power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is an example of vector?
(Name two examples)

A

Displacement, Momentum, Acceleration, Force or Velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the equation for speed?

A

Speed (m/s) = Distance (m) / Time (s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A man walks 20m in 10s. What is his average speed?

A

2 m/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

A dog runs 5 km in 10 seconds. What was his speed?

A

500 m/s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How do you calculate Distance?

A

Distance (m) = Speed (m/s) X Time (s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do you calculate Time

A

Time (s) = Distance (m) / Speed (m/s)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

A sheep runs at 12 m/s. How far will it move in 17 seconds ?

A

204 m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Jerry the dinosaur runs at 40 m/s for 100m. How long does it take to cover this distance?

A

2.5 seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the equation for Acceleration?

A

Acceleration (m/s2) = Change in Velocity (m/s) / Time (s)

                                   Change in Velocity (m/s) = Final Velocity - Initial Velocity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

A cat’s speed increases from 9 m/s to 21 m/s in a time of 4 seconds. What is the cat’s acceleration?

A

3m/s2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

On a distance/time graph. What is a flat line called?

A

A stationary line.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How do you calculate distance from a velocity time graph ?

A

You do velocity x speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do you calculate the stopping distance of a car?

A

Stopping distance = Thinking distance + Braking distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

If the speed of your car is going 40 mph and your braking distance has to be 19 and your stopping distance 38 what is your thinking distance?

A

19

18
Q

What is Energy?

A

Something that is needed to make things happen and change

19
Q

What can energy be measured in ?

A

Joules (j)

20
Q

What are the 9 forms of energy ?

A

Elastic Potential, Thermal, Chemical, Light, Gravitational Potential, Kinetic, Electric, Sound and Nuclear

21
Q

Where is chemical energy stored?

A

In chemical reactions like food, fuels and chemicals.

22
Q

Where is kinetic energy stored?

A

In an object that is moving

23
Q

Where is gravitational potential energy stored?

A

In an object because of its position

24
Q

Where is Elastic potential energy stored?

A

In an object when you stretch or squash it

25
Q

Where is thermal energy stored ?

A

In an object because of its temperature

26
Q

What does The Law of Conservation of Energy state?

A

“Energy cannot be created or destroyed, it can only be changed from one form to another.”

27
Q

In what ways can energy be transferred by ?

A

Forces, Heating, Light, Sound, Electric Current

28
Q

What is a Sankey Diagram?

A

It shows what and how much energy has been transferred.

29
Q

What is the equation for efficiency?

A

Efficiency = useful energy out/ total energy in

30
Q

A lorry engine uses 2000J of chemical energy and turns this into 400J of
kinetic, 1200J of heat and 400J of sound. What is the efficiency of the lorry engine?

A

20%

31
Q

What is the equation for GPE (Gravitational Potential Energy)?

A

GPE= mass (kg) x gravitational field strength (N/kg) x height (m)

32
Q

A man drops a 10kg bag of rice over a cliff that is 100m high, What is the bag of rice’s gravitational potential energy?
(G=10)

A

10,000J

33
Q

What is the equation for KE (Kinetic energy)?

A

KE= 1/2 x m x v2

34
Q

What is the KE of a 68kg man travelling at 10m/s ?

A

3400m/s2

35
Q

What is Renewable Energy?

A

It is an energy source that can be replenished as it is used.

36
Q

What is Non-Renewable Energy?

A

A resource that cannot be replaced when it is used up.

37
Q

What are the 7 types of renewable energy sources ?

A

Solar, Wind, Tidal, Wave , Hydroelectric, Geothermal and Biofuel.

38
Q

What are the 4 types of Non-Renewable energy sources ?

A

Coal, Gas, Oil and Nuclear

39
Q

What are fossil fuels?

A

They are remains of living organisms millions of years ago and release heat energy when burned.

40
Q

What are the disadvantages of fossil fuels?

A

*Can’t be reused
*Some of them emit Sulphur dioxide into the atmosphere (creates the greenhouse effect)
*Emits CO2 into atmosphere which contributes to global warming.

41
Q

What are the advantages to Fossil Fuels?

A

Fossil fuels are cheap and easy to obtain and much of our infrastructure is dependent on it.

Physics Y9 Revision (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions