Flashcards in Physics GCSE Equations NTK Deck (22)

Loading flashcards...

1

## Link speed, distance travelled and time taken

###
Distance travelled = average speed x time

Time = distance ÷ speed

Speed = distance ÷ time

Distance travelled - metres

Time - seconds

Speed - metres per second or m/s

2

## Link acceleration, change in speed and time taken

###
Acceleration = change in speed ÷ time

Time taken = change in speed ÷ acceleration

Change in speed = acceleration x time

Acceleration - metres per second squared

Time taken - seconds

Change in speed - metres per second

3

## Link force mass and acceleration

###
Force = mass x acceleration

Mass = force ÷acceleration

Acceleration = force ÷ mass

Force - Newtons

Mass - kilograms

Acceleration - metres per second squared

4

## Link weight mass and gravitational field strength

###
Weight = mass x Gravitational field strength

Mass = weight ÷ gfs

Gfs = weight ÷ mass

Weight - Newtons

Mass - kilograms

GFS - Newtons per kilogram or metres per second squared

5

## Link efficiency, energy supplied and useful energy transferred

###
Efficiency = useful energy transferred by the device ÷ energy supplied to the device

Energy supplied = useful energy transferred ÷ efficiency

Useful energy transferred = energy supplied x efficiency

Efficiency - no unit or expressed as a percentage

Energy supplied - Joules

Useful energy transferred - Joules

6

## Link mass, velocity and momentum

###
Momentum = mass x velocity

Mass = momentum ÷ velocity

Velocity = momentum ÷ mass

Momentum - kg m/s

Mass - kg

Velocity - m/s

7

## Link frequency, wavelength and wave speed

###
Wave speed = frequency x wavelength

Frequency = wave speed ÷ wavelength

Wavelength = wave speed ÷ frequency

Wave speed - m/s

Frequency - Hertz, Hz or per second

Wavelength - metres

8

## Link wave speed, distance travelled and time taken

###
Wave speed = distance travelled ÷ time taken

Distance travelled = wave speed x time

Time = distance travelled ÷ wave speed

Wave speed - m/s

Distance travelled - metres

Time - seconds

9

## Link mass volume and density

###
Density = mass ÷ volume

Mass = volume x density

Volume = mass ÷ density

Density - kg/m3

Mass - kilograms

Volume - m3 (cubic metres)

10

## Link work done , force and distance travelled in the direction of the force

###
Work done = force x distance moved in the direction of the force

Force = work done ÷ distance moved

Distance moved = wd ÷force

Work done - Joules

Force - Newtons

Distance moved - metres

11

## Link gravitational field strength, gravitational potential energy, mass and change in height

###
GPE = mass x g x change in height

Mass = GPE ÷ ( g x Δ h)

g = GPE ÷ ( mass x Δ h)

Δ h = GPE ÷ ( mass x g)

GPE - Joules

Mass - kilograms

g - m/s2 or N/kg

Δ h - metres

12

## Link kinetic energy, mass and velocity

###
Kinetic energy = ½ x mass x velocity2

Mass = 2 x KE ÷ velocity2

Velocity = square root of (2 x KE ÷ mass)

Kinetic energy - Joules

Mass - kilograms

Velocity - m/s

13

## Link power, energy(Work Done) and time taken

###
Power = work done ÷ time taken

Work done = power x time

Time = work done ÷ power

Power - Watts

Work done - Joules

Time - seconds

14

## Link charge, potential difference and energy transferred

###
Energy transferred = charge moved x potential difference

Charge = energy ÷ pd

pd = energy transferred ÷ charge

Energy transferred - Joules

Charge - Coulombs

pd - Volts (not voltage)

15

## Link current, charge and time

###
Charge = current x time

Current = charge ÷ time

Time = charge ÷ current

Charge - Coulombs

Current - Amps

Time - seconds

16

## Link potential difference, current and resistance

###
Potential difference = current x resistance

Current = pd ÷ resistance

Resistance = pd ÷ current

Potential difference - Volts

Current - Amps

Resistance - Ohms Ω

17

## Link power, energy transferred and time taken

###
Power = energy transferred ÷ time taken

Energy transferred = power x time

Time = energy ÷ power

Power - Watts

Energy - transferred Joules

Time - seconds

18

## Link power current and potential difference

###
Electrical power = current x potential difference

Current = power ÷ pd

pd = power ÷ current

Electrical power - Watts

Current - Amps

pd - Volts

19

## Link force, spring constant and extension

###
Force = spring constant x extension

Spring constant = force ÷ extension

Extension = force ÷ spring constant

Force - Newtons

Spring constant - N/m

Extension - metres

20

## Link moment, perpendicular force and distance from pivot

###
Moment = force x distance normal to the direction of the force

Force = moment ÷ distance

Distance = moment ÷ force

Moment - Nm or Newton metre

Force - Newton

Distance - metre

21

## Link pressure, force and area

###
Pressure = force normal to the area ÷ area

Force = pressure x area

Area = force ÷ pressure

Pressure - Pascals Pa N/m2

Force - Newtons

Area - m2

22