Brainscape's Knowledge GenomeTM

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


See full index

GCSE Physics > Energy > Flashcards

Energy Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Geography - AQA flashcards Physics 101 flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route B flashcards AP® Physics flashcards
1
Q

What is the unit for energy?

A

Joules

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

What are the different types of energy?

A 
Gravitational potential energy 
Elastic potential energy (e.g. rubber ball)
Kinetic energy 
Heat 
Light
Sound
Electrical 
Chemical (e.g. battery)
Nuclear
Magnetic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the principal of conservation of energy?

A

Energy cannot be created or destroyed, only changed from one form to another.

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

What do you call a device which transfers energy from one form to another?

A

Transducer

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

What are some examples of non renewable energy resources?

A

Coal
Oil
Gas
Nuclear

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

What are some examples of renewable energy resources?

A 
Wind
Solar
Hydroelectric 
Tidal
Wave
Geothermal
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is gravitational potential energy?

A

This is the energy an object has because of its position in a gravitational field. The amount of gravitational potential energy an object has depends on its mass, its height above the ground and the strength of the gravitational field.

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

What is the equation to find potential energy?

A

p.e. = mgh

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

What is kinetic energy?

A

The energy an object has because it is moving. The amount of kinetic energy an object has depends on its mass and on its speed and velocity.

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

Wha5 is the formula for kinetic energy?

A

k.e. = 1/2mv2

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

What is work?

A

When a force moves it’s point of application a certain distance, we say that work is done.

I.e the amount of energy changed from one force to another.

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

What is the equation used to calculate work?

A

W=Fxd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is power?

A

The power of something is how quickly it can do a certain amount of work

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

What is the equation for power?

A

Fxd
P=——
t

  Work done

P= ——————

  Time taken

OR

    Energy

P= —————

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

Watt is the unit of power

A

Correct

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

How would you measure your own power?

A

Measure the weight of the person using a neutron balance. Start the stopwatch as the person starts to run up the stairs. Stop the timer when they reach the top. Measure the height.

17
Q

How would you measure the power of an electric motor.

A

Time for motor to raise mass measured using stopwatch

height measured using metre stick

Mass is used to calculate the weight (w=mg)

18
Q

What is efficiency?

A

The ratio of the useful output to the imput

19
Q

What is the equation for efficiency?

A

. Desired output
Efficiency = ———————
. input

20
Q

How is potential energy calculated with kinetic energy?

A

P.e. = k.e1 - k.e2

GCSE Physics (14 decks)

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