Topic 7 & 8 - Forces Doing Work and Forces and their Effects COMPLETE PK Flashcards Preview

GCSE Combined Physics (Edexcel) > Topic 7 & 8 - Forces Doing Work and Forces and their Effects COMPLETE PK > Flashcards

Flashcards in Topic 7 & 8 - Forces Doing Work and Forces and their Effects COMPLETE PK Deck (88)
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1

1 What are the units for energy?

joules

2

2 How is energy transferred to a light bulb?

by electricity

3

3 How is energy transferred away from a light bulb?

by light, by heating

4

4 Describe one other way in which energy can be transferred.

by sound, by forces

5

5 What is a force?

a push or a pull

6

6 What are the units for measuring forces?

newtons

7

7 What is your weight?

the force of gravity pulling on you

8

8 What does work done mean in physics?

energy transferred by a force

9

9 What does power measure?

how fast energy is transferred/work is done

10

10 What are the units for power?

watts

11

11 What does work done mean?

energy transferred by a force

12

12 What are the units for work done?

joules

13

13 How do you calculate work done?

Multiply force by distance moved in the direction of the force.

14

14 What does power mean?

how fast energy is transferred

15

15 What are the units for power?

watts

16

16 How do you calculate power?

work done divided by time

17

17 Two people with the same weight go up a flight of stairs. How can you tell which one has exerted more power?

the one that went up fastest

18

18 Name two non-contact forces.

two from: gravity, magnetism, static electricity

19

19 What is a magnetic field?

the space around a magnet where it can affect things

20

20 What is a vector quantity?

a quantity that has both magnitude and direction

21

21 Name two contact forces.

any two from: normal contact force, upthrust, air resistance, etc.

22

22 Name three non-contact forces.

gravity, magnetism, static electricity

23

23 How is a force represented in a diagram?

arrow showing direction, with length indicating size

24

24 What are the units for measuring force?

newtons

25

25 Why is weight a vector quantity?

It has a direction as well as a magnitude.

26

26 The Earth attracts the Moon via gravity. What is the other force in this action?reaction pair?

the Moon attracting the Earth

27

27 What is the name for the space around an object where it attracts things with mass?

a gravitational field

28

28 What is the name for the space around something with an electric charge where it can affect other objects?

an electrostatic or electric field

29

29 What is the name for a single force that represents the combined effects of all the forces on an object?

a resultant force

30

30 What is the name for a diagram where a measurement on the diagram represents a larger measurement in real life?

a scale diagram