All Equations

Question 1

Average Speed =

Answer 1

Distance moved / time taken

Question 2

Acceleration =

Answer 2

Change in velocity / time taken

Question 3

(Final speed)**2 =

Answer 3

(initial speed)**2 + (2 x acceleration x distance moved)

Question 4

Force =

Answer 4

Mass x Acceleration

Question 5

Weight =

Answer 5

Mass x gravitational field strength

Question 6

Momentum =

Answer 6

Mass x velocity

Question 7

Force (using momentum)

Answer 7

Change in momentum / time taken

Question 8

Moment =

Answer 8

Force x perpendicular distance from pivot

Question 9

Wave speed =

Answer 9

Frequency x wavelength

Question 10

Frequency =

Answer 10

1 / Time period

Question 11

Refractive index =

Answer 11

sin i / sin r

Question 12

Critical angle =

Answer 12

1 / refractive index

Question 13

Efficiency =

Answer 13

(useful energy output / total energy output) x 100%

Question 14

Work done =

Answer 14

force x distance moved

Question 15

GPE =

Answer 15

mass x gravitational field strength x height

Question 16

Kinetic Energy =

Answer 16

1/2 x mass x speed**2

Question 17

Power =

Answer 17

work done / time taken

Question 18

Density =

Answer 18

Mass / volume

Question 19

Pressure =

Answer 19

Force / Area

Question 20

Pressure difference =

Answer 20

Height x Denisty x gravitational field strength

Question 21

Change in thermal energy =

Answer 21

mass x specific heat capacity x change in temperature

Question 22

Relationship between pressure and Kelvin temperature

Answer 22

p1 / T1 = p2 / T2

Question 23

Relationship between pressure and volume

Answer 23

p1 x V1 = p2 x V2