Equations Youre Not Given

Question 1

Density

Answer 1

Mass / volume

Question 2

Distance travelled

Answer 2

Speed x time

Question 3

Mass

Answer 3

Density x volume

Question 4

Speed

Answer 4

Distance travelled / time

Question 5

Acceleration

Answer 5

Change in velocity / time

Question 6

Change in velocity

Answer 6

Time x acceleration

Question 7

Time

Answer 7

Distance travelled/ speed
Or
Change in velocity / acceleration
Or
Work done/power
Or
Charge flow/ current
Or
Energy transferred/power

Question 8

Kinetic energy

Answer 8

0.5 x mass x velocity ^2

Question 9

Force

Answer 9

Mass x acceleration

Question 10

Velocity

Answer 10

Momentum/mass
Or
The square root of : 2x kinetic energy/ mass

Question 11

Work done

Answer 11

Force x distance moved in direction of force

Question 12

Power

Answer 12

Workdone / time

Question 13

Workdone

Answer 13

Force x distance
Or
Power x time

Question 14

Force exerted by spring

Answer 14

Spring constant x extension

Question 15

Extension of spring

Answer 15

Force exerted by spring / spring constant

Question 16

Gravity force

Answer 16

Mass x gravitational field strength

Question 17

(In a gravity field ) potential energy

Answer 17

Mass x height x gravitational field strength

Question 18

Pressure

Answer 18

Force normal to surface / area

Question 19

Moment of force

Answer 19

Force x distance

Question 20

Charge flow

Answer 20

Current x time

Question 21

Potential difference

Answer 21

Current x resistance

Question 22

Energy transferred

Answer 22

Charge x potential difference

Question 23

Power

Answer 23

Potential difference x current
Or
Current ^2 x resistance
Or 
work done /time

Question 24

Energy transferred

Answer 24

Power x time

Question 25

Wave speed

Answer 25

Frequency x wavelength

Question 26

Efficiency

Answer 26

Useful output energy/ input energy