Physics Paper 1 Formulae

Question 1

Average Speed

Answer 1

average speed = distance/time

Question 2

acceleration

Answer 2

acceleration = change in velocity / time taken

Question 3

force

Answer 3

force = mass x acceleration

Question 4

weight

Answer 4

weight = mass x g

Question 5

moment

Answer 5

moment = force x perpendicular distance from pivot

Question 6

orbital speed

Answer 6

orbital speed = 2πorbitalradius / time

Question 7

force (momentum)

Answer 7

force = change in momentum / time taken

Question 8

electrical power

Answer 8

power = current x voltage

Question 9

energy transferred

Answer 9

energy transferred = current x voltage x time

Question 10

voltage

Answer 10

voltage = current x resistance

Question 11

charge

Answer 11

charge = current x time

Question 12

wave speed

Answer 12

wave speed = frequency x wavelength

Question 13

frequency

Answer 13

frequency = 1/time period

Question 14

refractive index

Answer 14

refractive index = sin(angle of incidence) / sin (angle of refraction)

Question 15

sin(critical angle)

Answer 15

sin(critical angle) = 1/refractive index

Question 16

efficiency

Answer 16

useful energy output/total energy input

Question 17

work done

Answer 17

work done = force x distance

Question 18

gravitational potential energy

Answer 18

gpe = mass x g x height

Question 19

kinetic energy

Answer 19

kinetic energy = 1/2 x mass x speed^2

Question 20

power

Answer 20

power = work done/time taken

Question 21

density

Answer 21

density = mass/volume

Question 22

pressure

Answer 22

pressure = force/area

Question 23

pressure difference

Answer 23

height x density x g

Question 24

pressure 1 x volume 1 =

Answer 24

pressure 2 x volume 2