Formulas

Question 1

Power

Answer 1

Work Done
____________

Time Taken

Question 2

P1
___ =

T1

Answer 2

P2
___

T2

Question 3

Pressure Difference =

Answer 3

Height x Density x Gravity

P=HPG (in liquids)

Question 4

Kenetic Energy =

Answer 4

1/2 Mass x Speed squared

KE=1/2MVsquared

Question 5

Gravitational Potential Energy =

Answer 5

Mass x Gravitational Field Strength x Height

GPE = MGH

Question 6

Density =

Answer 6

Mass
______

Volume

P= M
__
V

Question 7

Pressure =

Answer 7

Force
______

Area

P=F
__
A

Question 8

Total Internal Reflection =

Answer 8

Refractive Index

n = 1
__
SinC

Question 9

Average Speed =

Answer 9

Distance
_________

Time

V=D D
___ ____
T SxT

Question 10

Weight =

Answer 10

Mass x Gravitational Field Strength

W=MG

Question 11

Moment =

Answer 11

Force x Perpendicular Distance from Pivot

Moment = FxD

Question 12

Energy =

Answer 12

Power x Time

E=PxT

Question 13

Charge =

Answer 13

Current x Time

Q= IxT

Question 14

Wave Speed =

Answer 14

Frequency x Wave Length

V=fxŷ (lamda)

Question 15

Law of Reflection =

Answer 15

Angle of Incidence = Angle of Refraction

Question 16

Efficiency =

Answer 16

Useful Energy Output
_______________________
x100
Total Energy Output

Question 17

Acceleration =

Answer 17

Change in Velocity
____________________

      Time

a=v-u
____
T

Question 18

Force =

Answer 18

Mass x Acceleration

F=ma

Question 19

Momentum =

Answer 19

Mass x Velocity

P=MV

Question 20

Power =

Answer 20

Current x Voltage

P=IV

Question 21

Energy =

Answer 21

Current x Voltage x Time

E=IVt

Question 22

Voltage =

Answer 22

Current x Resistance

V=IR

Question 23

Law of Refraction =

Answer 23

Refractive Index :

SinI n=SinI
____ ____

SinR SinR

Question 24

Work Done =

Answer 24

Force x Distance

W=FxD