Equations

Question 0

Force =

Answer 0

Mass x Acceleration

Question 1

Speed =

Answer 1

Time

Question 2

Acceleration =

Answer 2

Time taken

Question 3

Momentum =

Answer 3

Mass x Velocity

Question 4

Density =

Answer 4

Volume

Question 5

Efficiency =

Answer 5

Total energy input

Question 6

Work done =

Answer 6

Force x perpendicular distance moved

Question 7

Work done =

Answer 7

Energy transferred

Question 8

Kinetic Energy =

Answer 8

1 2
- x mass x speed
2

Question 9

Change in potential energy =

Answer 9

Mass x gravitational field strength x change in height

Question 10

Weight =

Answer 10

Mass x gravitational field strength

Question 11

Pressure =

Answer 11

Area

Question 12

Moment =

Answer 12

Force x perpendicular distance from pivot

Question 13

Charge =

Answer 13

Current x time

Question 14

Voltage =

Answer 14

Current x resistance

Question 15

Electrical power =

Answer 15

Voltage x current

Question 16

Wave speed =

Answer 16

Frequency x wavelength

Question 17

Input power =

Answer 17

Output power

Question 18

Relationship between turns, power and voltage for a transformer

Answer 18

Vp np
—- = —
Vs ns

Question 19

Refractive index =

Answer 19

n= sin i
—–
sin r

Question 20

Critical angle =

Answer 20

1
sin c = –
n

Question 21

Pressure difference=

Answer 21

Height x density x g