Physics IGCSE equations

Question 1

RESULTANT FORCE

Answer 1

CHANGE IN MOMENTUM/TIME

Question 2

ENERGY TRANSFERRED

Answer 2

MASS X SPECIFIC HEAT X TEMPERATURE CHANGE

CAPACITY

Question 3

POWER THROUGH A TRANSFORMER

Answer 3

V1XI1=V2XI2

Question 4

FORCE

Answer 4

MASS X ACCELERATION

Question 5

EFFICIENCY

Answer 5

USEFUL ENERGY OUTPUT/TOTAL ENERGY INPUT

USEFUL WORK DONE/TOTAL ENERGY INPUT

USEFUL POWER OUTPUT/TOTAL POWER INPUT

Question 6

WAVE EQUATION

Answer 6

FREQUENCY X WAVELENGTH

Question 7

USEFUL POWER OUTPUT

Answer 7

FORCE X SPEED

Question 8

MOMENT OF A FORCE ABOUT A POINT

Answer 8

FORCE X PERPENDICULAR DISTANCE FROM

THE POINT

Question 9

DENSITY

Answer 9

MASS/VOLUME

Question 10

PRESSURE

Answer 10

FORCE/AREA

Question 11

VOLUME

Answer 11

MASS/DENSITY

Question 12

RESISTANCE

Answer 12

P.D. ACROSS CONDUCTOR/CURRENT

THROUGH CONDUCTOR

Question 13

ACCELERATION

Answer 13

CHANGE IN VELOCITY/TIME

Question 14

SNELL’S LAW

Answer 14

SIN i/SIN r =IS CONSTANT

Question 15

LOAD

Answer 15

SPRING CONSTANT X EXTENSION

Question 16

KELVIN TEMPERATURE

Answer 16

CELSIUS TEMPERATURE + 273

Question 17

MASS

Answer 17

VOLUME X DENSITY

Question 18

COMBINES RESISTANCE

Answer 18

RESISTANCES MULTIPLES/RESISTANCES ADDED

Rp = R1XR2/R1+R2

Question 19

WAVE SPEED

Answer 19

FREQUENCY X WAVELENGTH

Question 20

AVERAGE SPEED

Answer 20

DISTANCE MOVED/TIME TAKEN

Question 21

PRESSURE IN A LIQUID

Answer 21

DENSITY X g X HEIGHT

Question 22

ENERGY TRANSFORMED

Answer 22

POWER X TIME

P.D. X CURRENT X TIME

Question 23

CURRENT

Answer 23

CHARGE/TIME TAKEN

Question 24

OUTPUT VOLTAGE/INPUT VOLTAGE =

Answer 24

TURNS ON OUTPUT COIL/TURNS ON INPUT COIL

Question 25

BOYLE’S LAW

COMPRESSING GASSES

Answer 25

P1XV1=P2XV2 (AT CONSTANT TEMPERATURE)

Question 26

REFRACTIVE INDEX

Answer 26

SPEED OF LIGHT IN/SPEED OF LIGHT IN

MEDIUM VACUUM

Question 27

RESULTANT FORCE

Answer 27

MASS X ACCELERATION

Question 28

WORK DONE

Answer 28

FORCE X DISTANCE MOVED IN THE DIRECTION OF

THE FORCE

Question 29

KINETIC ENERGY

Answer 29

1/2 X MASS X VELOCITY^2

Question 30

MOMENTUM

Answer 30

MASS X VELOCITY

Question 31

SIN C =

Answer 31

1/r

Question 32

WEIGHT

Answer 32

MASS X g (g = 10N)

Question 33

POWER

Answer 33

WORK DONE /TIME TAKEN

ENERGY TRANSFORMED/TIME TAKEN

P.D. X CURRENT

Question 34

CHARGE

Answer 34

CURRENT X TIME

Question 35

GRAVITATIONAL POTENTIAL ENERGY

Answer 35

MASS X g X HEIGHT

Question 36

RESISTIVITY

Answer 36

Rho X 1/4

Rho X (LENGTH/AREA)

1/R = 1/R1 + 1/R2

R = R1 + R2

(RESISTANCE A X AREA A)/LENGTH A
= (RESISTANCE B X AREA B)/LENGTH B