Physics Equations

Question 1

Kinetic energy

Answer 1

1/2 x mass x speed^2

Question 2

Gravitational potential energy

Answer 2

Mass x gfs x height

Question 3

Equation for power (work done and energy transfer)

Answer 3

Power= work done % time taken

Energy transferred % time taken

Question 4

Efficiency for power and energy about total power and energy

Answer 4

Total energy output%total energy input x100

Total power output%total power input x100

Question 5

Density

Answer 5

Mass%volume

Question 6

Charge

Answer 6

Current x time

Question 7

Potential difference

Answer 7

Current x resistance

Question 8

Total resistance

Answer 8

Resistance of component 1 + resistance of component 2

Question 9

Power for electricity 1

Answer 9

Current x potential difference

Question 10

Power for electricity 2

Answer 10

Current^2 x resistance

Question 11

Energy transferred P

Answer 11

Power x time

Question 12

Energy transferred electricity

Answer 12

Charge flow x potential difference

Question 13

Weight

Answer 13

Mass x gravitational field strength

Question 14

Work done

Answer 14

Force x distance

Question 15

Force (to do with stretching)

Answer 15

Spring constant x extension

Question 16

Moment

Answer 16

Force x distance

Question 17

Pressure

Answer 17

Force % area

Question 18

Distance

Answer 18

Speed x time

Question 19

Acceleration

Answer 19

Change in velocity %time taken

Final v-initial v % time taken

Question 20

Resultant force

Answer 20

Mass x acceleration