Physics Formulas

Question 1

What is the symbol and unit for length?

Answer 1

l

metres (m)

Question 2

What is the symbol and unit for area?

Answer 2

A

metres squared (m²)

Question 3

What is the symbol and unit for volume?

Answer 3

V

metres cubed (m³)

Question 4

What is the symbol and unit for time?

Answer 4

t

seconds (s)

Question 5

What is the symbol and unit for distance or displacement?

Answer 5

s

metres (m)

Question 6

What is the symbol and unit for speed or velocity?

Answer 6

v

metres per second (m/s)

Question 7

What is the symbol and unit for acceleration?

Answer 7

A

metres per seconds squared (m/s²)

Question 8

What is the symbol and unit for mass?

Answer 8

m

kilograms (kg)

Question 9

What is the symbol and unit for force?

Answer 9

F

Newtons (N)

Question 10

What is the symbol and unit for weight?

Answer 10

W

Newtons (N)

Question 11

What is the symbol and unit for gravitational field strength?

Answer 11

g

newtons per kilogram (N/kg)

Question 12

What is the symbol and unit for energy (work)?

Answer 12

E

joules (J)

Question 13

What is the symbol and unit for power?

Answer 13

P

Watt (W)

Question 14

What is the symbol and unit for charge?

Answer 14

Q

coulomb (C)

Question 15

What is the symbol and unit for current?

Answer 15

I

amp (A)

Question 16

What is the symbol and unit for voltage (potential difference)?

Answer 16

V (p.d.)

volt (V)

Question 17

What is the symbol and unit for resistance?

Answer 17

R

ohm (Ω)

Question 18

What is the symbol and unit for pressure?

Answer 18

P

Pascal (Pa)

Question 19

What is the symbol and unit for density?

Answer 19

ρ

kilogram per metres cubed (kg/m³)

Question 20

What is the symbol and unit for wavelength?

Answer 20

λ

metres (m)

Question 21

What is the symbol and unit for frequency?

Answer 21

f

Hertz (Hz)

Question 22

What is the symbol and unit for time period?

Answer 22

T

seconds (s)

Question 23

What is the symbol and unit for angle?

Answer 23

θ

degree (°)

Question 24

What is the symbol and unit for temperature?

Answer 24

T

Celsius (°C)

Question 25

How to calculate speed?

Answer 25

Speed = distance / time

Question 26

How to calculate acceleration?

Answer 26

Acceleration = change in velocity / time

Question 27

How to calculate density?

Answer 27

Density = mass / volume

Question 28

How to calculate weight?

Answer 28

Weight = mass x gravitational field strength

Question 29

How to calculate pressure?

Answer 29

Pressure = force / area

Question 30

How to calculate charge?

Answer 30

Charge = current x time

Question 31

How to calculate voltage?

Answer 31

Voltage = current x resistance

Question 32

How to calculate voltage (alternative)?

Answer 32

Voltage = energy / charge

Question 33

How to calculate power?

Answer 33

Power = voltage x current

Question 34

How to calculate power (alternative)?

Answer 34

Power = energy / time

Question 35

How to calculate wavespeed?

Answer 35

Wavespeed = frequency x wavelength

Question 36

How to calculate frequency?

Answer 36

Frequency = 1 / time period

Question 37

What is wavespeed measured in?

Answer 37

Metres per second (m/s)

Question 38

How to calculate average speed?

Answer 38

Average speed = distance moved / time taken

Question 39

How to calculate efficiency?

Answer 39

Efficiency = useful energy output / total energy output x 100%