Equations

Question 1

Average Speed

Answer 1

Distance moved/time taken

Question 2

Acceleration

Answer 2

Change in velocity/time taken

Question 3

Final speed ^2

Answer 3

Initial speed ^2 + 2accelerationdistance moved

Question 4

Force

Answer 4

Mass*acceleration

Question 5

Weight

Answer 5

Mass*gravitational field strength

Question 6

Power

Answer 6

Current*voltage

Question 7

Energy transferred

Answer 7

Currentvoltagetime

Question 8

Voltage

Answer 8

Current*resistance

Question 9

Charge

Answer 9

Current*time

Question 10

Energy transferred

Answer 10

Charge*voltage

Question 11

Wave speed

Answer 11

Frequency*wavelength

Question 12

Frequency

Answer 12

1/time period

Question 13

Refractive index

Answer 13

Sin of angle of incidence/ Sin of angle of refraction

Question 14

Sin of critical angle

Answer 14

1/ refractive index

Question 15

Efficiency

Answer 15

(Useful energy output/ total energy output) *100

Question 16

Work done

Answer 16

Force*distance moved

Question 17

Gravitational potential energy

Answer 17

Massgravitational field strengthheight

Question 18

Kinetic energy

Answer 18

0.5massspeed^2

Question 19

Power

Answer 19

Work done/ time

Question 20

Density

Answer 20

Mass/volume

Question 21

Pressure

Answer 21

Force/area

Question 22

Pressure difference

Answer 22

Heightdensitygravitational field strength

Question 23

Pressure - temperature

Answer 23

Constant P1/T1 = P2/T2

Question 24

Orbital speed

Answer 24

(2πorbital radius)/time period

Question 25

Momentum

Answer 25

Mass*velocity

Question 26

Force

Answer 26

Change in momentum/time taken

Question 27

Moment

Answer 27

Force*perpendicular distance from pivot

Question 28

Change in thermal energy

Answer 28

Mass*specific heat capacity*change in temperature

Question 29

Relationship between input and output voltages for a transformers

Answer 29

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

Question 30

Input power

Answer 30

Output power VpIp=VsIs

Question 31

Change in wavelength/reference wavelength

Answer 31

Velocity of a galaxy/speed of light

Question 32

Work done

Answer 32

Energy transferred