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Flashcards in Equations Deck (32):
0

Speed =

Distance travelled \ time taken

1

Velocity =

Increase in displacement / time taken

2

Acceleration =

Change in velocity / time taken

3

Force is proportional to what ?

Acceleration

4

Acceleration is inversely proportional to ??

Mass

5

Force (N) =

Mass (kg) x acceleration

6

Weight =

Mass of object (kg) x acceleration due to gravity

7

Momentum =

Mass (kg) x velocity

8

Force =

Change in momentum / time taken

9

Increase in momentum =

Force x time

10

Momentum before collision =

Momentum after collision

11

Moment of force (Nm) =

Force (N) x perpendicular force from pivot

12

Orbital speed =

2 x pi x orbital radius / time period

13

Power (watts) =

Current (amps) x voltage

14

Energy converted (j) =

Power (watts) x time (seconds)

15

Charge (coulombs) =

Current (amps) x time (seconds)

16

Voltage =

Current (amps) x resistance (ohms)

17

Frequency (hertz) =

1 / time period (seconds)

18

Wave speed (m/s) =

Frequency (hertz) x wavelength (m)

19

Refractive index =

Sine (incidence angle) / sine (refractive index)

20

Sine (critical angle) =

1 / refractive index

21

Work done (joules) =

Force (N) x distance (M)

22

Change in GPE (joules) =

Mass (kg) x gravity x distance raised against gravitational force (metres)

23

Kinetic energy =

1/2 x mass (kg) x speed (m/s)

24

Power (watts) =

Work done (joules) / time taken (s)

25

Gain in GPE =

Gain in GPE = gain of kinetic energy before impact

26

Density =

Mass / volume

27

Pressure (pascals) =

Force (N) / area (m/2)

28

Pressure difference (pascals) =

Height (M) x density x gravity

29

Pressure 1 x volume 1=

Pressure 2 x volume 2

30

Pressure 1 / temperature 1 =

Pressure 2 / temperature 2

31

Input voltage / output voltage =

Number of turns on primary coil / number of coils on secondary