Formula

Question 1

Weight

Answer 1

Mass x gravitational field strength

Question 2

Work done

Answer 2

Force x distance along the line of action of the force

Question 3

Force applied to a spring

Answer 3

Spring constant x exstension

Question 4

Moment of a force

Answer 4

Force x distance normal to direction of force

Question 5

Pressure

Answer 5

Force normal to a surface

area of that surface

Question 6

Distance

Answer 6

Sped x time

Question 7

Acceleration

Answer 7

Change in velocity

Time taken

Question 8

Resultant force

Answer 8

Mass x acceleration

Question 9

Momentum

Answer 9

Mass x velocity

Question 10

Efficiency

Answer 10

Useful output energy transfer

Useful input energy transfer

Question 12

Kinetic energy

Answer 12

0.5 x mass x velocity^2

Question 13

Power

Answer 13

Work done

Time

Question 14

Efficiency

Answer 14

Useful power output

Total power output

Question 16

GPE

Answer 16

Mass x gravitational field strength x height

Question 18

Power

Answer 18

Energy transferred

Time

Question 19

Wave speed

Answer 19

Frequency x Wavelength

Question 20

Charge flow

Answer 20

Current x time

Question 21

Potential difference

Answer 21

Current x resistance

Question 22

Power

Answer 22

Potential difference x current

Question 23

Power

Answer 23

Current^2 x resistance

Question 24

Energy transferred

Answer 24

Power x time

Question 25

Energy transferred

Answer 25

Charge flow x potential difference

Question 26

Density

Answer 26

Mass

Volume

Question 27

Force

Answer 27

Change in momentum

Time taken

Question 28

Elastic potential energy

Answer 28

0.5 x spring constant x extension ^2

Question 29

Change in thermal energy

Answer 29

Mass x specific heat capacity x temperature change

Question 30

Thermal energy for change of state

Answer 30

Mass x specific latent heat