Equations (Ben)

Question 1

weight

Answer 1

mass x gravitational field strength

Question 2

distance travelled

Answer 2

speed x time taken

Question 3

force

Answer 3

mass x acceleration

Question 4

momentum

Answer 4

mass x velocity

Question 5

moment

Answer 5

force x perpendicular distance from pivot

Question 6

orbital speed

Answer 6

Time taken to complete one period

Question 7

electrical power

Answer 7

current x voltage

Question 8

energy transferred

Answer 8

power x time

Question 9

voltage

Answer 9

current x resistance

Question 10

wave speed

Answer 10

frequency x wavelength

Question 11

angle of incidence

Answer 11

angle of reflection

Question 12

refractive index, n

Answer 12

sin r

Question 13

refractive, n

Answer 13

sin c

Question 14

efficiency

Answer 14

total energy input to the system

Question 15

work, W

Answer 15

force, F x distance, d

Question 16

GPE

Answer 16

mass, m x gravitational field strength, g x height, h

Question 17

KE

Answer 17

0.5 x mass x speed^2

Question 18

power, P

Answer 18

time taken, t

Question 19

density

Answer 19

volume, v

Question 20

pressure, p

Answer 20

area, A

Question 21

pressure difference in a liquid, p (in Pa)

Answer 21

height (in metres), h x density (kg/m^3) x gravitational field strength (N/kg), g

Question 22

volume1, v x pressure1, p

Answer 22

volume2, v x pressure2, p

Question 23

temperature1, t

Answer 23

temperature2, t

Question 24

output (secondary) voltage

Answer 24

secondary turns