Formulas

Question 1

average speed =

Answer 1

distance moved /time taken

Question 2

acceleration =

Answer 2

change in velocity / time taken

Question 3

force =

Answer 3

mass x acceleration

Question 4

weight =

Answer 4

mass x g

Question 5

momentum =

Answer 5

mass x velocity

Question 6

moment =

Answer 6

force x perpindicular distance

Question 7

Q (charge) =

Answer 7

I x t (current x time)

Question 8

E (energy) =

Answer 8

Q x V (charge x voltage)

Question 9

V (voltage) =

Answer 9

I x R (current x resistsance)

Question 10

P (power) =

Answer 10

I x V (current x voltage)

Question 11

wave speed =

Answer 11

frequency x wavelength

Question 12

n (refractive index) =

Answer 12

sin i / sin r

Question 13

sin c (sin of critical angle) =

Answer 13

1/n (refractive index)

Question 14

effeciency =

Answer 14

useful energy output / total energy output

Question 15

GPE (gravitational potential energy) =

Answer 15

m x g x h (mass x gravitational field strength(N) x height)

Question 16

KE (kinetic energy) =

Answer 16

1/2 x m x v2

Question 17

formula for energy transfered

Answer 17

energy transfered = work done

Question 18

energy P (power) =

Answer 18

W/t (work/time)

Question 19

density =

Answer 19

mass / volume

Question 20

P (pressure)

Answer 20

force/area

Question 21

pressure (in a liquid)

Answer 21

h x p x g (depth x density x gravitational feild strength)

Question 22

wave speed =

Answer 22

frequency x wavelength

Question 23

frequency =

Answer 23

1 / time period

Question 24

work done =

Answer 24

force x distance moved