# Key concepts (topic 1) Flashcards Preview

## Physics GCSE > Key concepts (topic 1) > Flashcards

Flashcards in Key concepts (topic 1) Deck (24)
1
Q

What is a scalar quantity?

A

A quantity with only magnitude.

2
Q

What type of quantity is one that has magnitude and direction?

A

A vector quantity.

3
Q

What are the equations for acceleration?

A

Acceleration(a) = changing speed(v-u)/time taken (s)

4
Q

What are the units for acceleration?

A

m/s squared

5
Q

On a speed time graph, what does a horizontal line represent?

A

a constant speed

6
Q

What does the area of the section underneath a speed time diagram?

A

The total distance travelled

7
Q

What is the equation for work done?

A

force x distance

8
Q

how to work out moment?

A

force x perpendicular distance to the direction of the force

9
Q

How to work out he unknown force in a balance board diagram (sea saw with weights either side)

A

1) label either side of sea saw
2) force 1 + distance 1 = force 2 + distance 2
3) re arrange so force is on its own

10
Q

How to work out the number of rotations of the gears

A

driven/driver

e.g. 2/1 = 2:1

11
Q

What is current measured in?

A

Amps (A)

12
Q

What is the amount of substance measure in?

A

moles (mol)

13
Q

What is the measure of frequency?

A

Hertz (Hz)

14
Q

What is the measure of force?

A

Newtons

15
Q

what is the measure of energy?

A

Joules (J)

16
Q

What is the measure of power?

A

Watt (W)

17
Q

what is the measure of pressure?

A

Pascal’s (Pa)

18
Q

What is electrical charge measured in?

A

coulombs (C)

19
Q

What is electric potential difference measured in?

A

Volts (V)

20
Q

What is electric resistance measured in?

A

ohm

21
Q

What is the unit of magnetic flux density?

A

Tesla (T)

22
Q

What is the value of nano?

A

10 [-9]

23
Q

What is the value of micro?

A

10[-6]

24
Q

what is the value of milli?

A

10[-3]