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Physics GCSE Y11 (F) > Units & Equations > Flashcards

Flashcards in Units & Equations Deck (42)
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1

What is the unit for density?

g/cm3 or kg/m3

2

What is the unit for charge flow?

Columbs, C

3

What is the equation relating pressure, force and area?

pressure = force / area

4

What is the unit for resistance?

Ohms

5

What is the equation relating power, work done and time?

Power = work done / time or Work done = power x time

6

What is the unit for speed?

m/s

7

What is the equation relating power, current and resistance?

Power = current^2 x resistance

8

What is the unit for gravitational potential energy?

J

9

What is the unit for mass?

kg

10

What is the unit for force?

Newtons

11

What is the unit for moment?

Nm

12

What is the equation for efficiency?

efficiency = useful power/energy / total power/energy

13

What is the unit for weight?

N (it is a force)

14

What is the unit for momentum?

kgm/s

15

What is the equation relating wave speed, frequency and wavelength?

wave speed = wavelength x frequency

16

What is the equation relating power, energy transferred and time?

Power = energy transferred / time

17

What is the equation that relates energy transferred, power and time?

Energy transferred = power x time

18

What is the equation relating charge flow, current and time?

Charge flow = current x time

19

What is the equation for gravitational potential energy?

G.P.E = mass x gravity x height

20

What is the unit for acceleration?

m/s2

21

What is the equation relating work done, force and distance?

work done = force x distance

22

What is the unit for pressure?

N/m2 or Pa

23

What is the equation relating force, mass and acceleration?

force = mass x acceleration

24

What is the unit for wavelength?

m

25

What is the unit for potential difference?

Volts, V

26

What is the equation relating potential difference, current and resistance?

Potential difference = current x resistance

27

What is the unit for work done?

J or Nm

28

What is the unit for wave speed?

m/s

29

What is the equation relating acceleration, change in velocity (speed) and time?

acceleration = change in speed / time taken

30

What is the equation relating force in a spring. spring constant and extension?

force = spring constant x extension

31

What is the equation that relates moment, force and distance?

Moment = force x distance

32

What is the equation relating momentum, speed and mass? (Higher Tier Only)

momentum = speed x mass

33

What is the unit for power?

Watt, W

34

What is the equation relating weight, mass and gravitational field strength?

weight = mass x gravitational field strength

35

What is the equation that relates energy transferred, potential difference and charge flow?

Energy transferred = potential difference x charge flow

36

What is the unit for current?

Amps, A

37

What is the unit for frequency?

Hz

38

What is the equation relating power, potential difference and current?

Power = potential difference x current

39

What is the unit for kinetic energy?

J, Joules (all energy has units Joules)

40

What is the equation that relates density, mass and volume?

density = mass / volume

41

What is the equation relating speed, distance and time?

Distance = speed x time or Speed = distance / time

42

What is the equation for kinetic energy?

kinetic energy = 1/2 x mass x speed^2