Equations

Question 0

Speed =

Answer 0

Distance/ time

Question 1

Acceleration =

Answer 1

Change in velocity / time

Question 2

Weight =

Answer 2

Mass x gravitational field strength

Question 3

Force =

Answer 3

Mass x acceleration

Question 4

Momentum =

Answer 4

Mass x velocity

Question 5

Moment =

Answer 5

Force x distance from perpendicular pivot

Question 6

Electrical power =

Answer 6

Current x voltage

Question 7

Voltage =

Answer 7

Current x resistance

Question 8

Charge =

Answer 8

Current x time

Question 9

Wavespeed =

Answer 9

Frequency x wavelength

Question 10

Refractive index =

Answer 10

Sin angle I/sin angle r

Question 11

Sin C =

Answer 11

1/ refractive index

Question 12

Efficiency =

Answer 12

Useful energy output/ total energy output

Question 13

Work done =

Answer 13

Force x distance moved

Question 14

Power =

Answer 14

Work done/ time

Question 15

Kinetic energy =

Answer 15

1/2 x mass x speed2

Question 16

GPE =

Answer 16

Mass x g x height

g is always 10 m/s2

Question 17

Density =

Answer 17

Mass/volume

Question 18

Pressure =

Answer 18

Force/area

Question 19

Pressure difference =

Answer 19

Height x density x g

g is always 10 m/s2

Question 20

Input (primary) voltage / output (secondary) voltage =

Answer 20

Primary turns / secondary turns

Question 21

Potential difference =

Answer 21

Energy difference / charge

Question 22

Momentum before =

Answer 22

Momentum after

Question 23

Total clockwise =

Answer 23

Total anticlockwise

Question 24

(pressure x volume) P1 x V1=

Answer 24

P2 x V2 | constant

Question 25

Kelvins =

Answer 25

Degrees + 273

Question 26

Force acting =

Answer 26

Change in momentum/ time take for change

Question 27

Energy transferred =

Answer 27

Current x voltage x time

Question 28

Frequency =

Answer 28

1/time period

Question 29

Energy transferred =

Answer 29

Work done

Question 30

Input power (Vp x Ip) =

Answer 30

Output power (Vs x Is) For 100% efficiency