Equations foe PHYs GCSEs

Question 1

Average speed, distance and time

Answer 1

s=d/t

Question 2

mass, force and acceleration

Answer 2

F=ma

Question 3

Mass, weight and Gravitational feild strength

Answer 3

W=mg

Question 4

time, change in velocity and acceleration

Answer 4

a=v-u/t

Question 5

Momentum, mass and velocity

Answer 5

p=mv

Question 6

time, force and change in momentum

Answer 6

F=(change in)p/t

Question 7

moment, perpendicular distance from pivot and force

Answer 7

moment=Fd

Question 8

current, charge and time

Answer 8

Q=It

Question 9

voltage, current and resistance

Answer 9

V=IR

Question 10

voltage, electrical power and current

Answer 10

P=VI

Question 11

electrical energy transferred, power, time, current, voltage and time

Answer 11

E=Pt=IVt

Question 12

frequency and time period

Answer 12

f=1/t

Question 13

frequency, wavelength and wave speed

Answer 13

v=f*lamda

Question 14

sin(angle of incidence), refractive index and sin(angle of refraction)

Answer 14

n=sin i/sin r

Question 15

refractive index and sin(critical angle)

Answer 15

sin c= 1/n

Question 16

useful energy output, total energy input and efficiency

Answer 16

efficiency= useful energy output/total energy input

Question 17

work done, force, distance moved in direction of force

Answer 17

E=Fd

Question 18

energy transferred and work done

Answer 18

energy transferred =work done

Question 19

kinetic energy, mass and velocity

Answer 19

Ek=1/2 x m x v*2

Question 20

gravitational potential energy, mass, height and gravitational field strength

Answer 20

Ep=m x g x (change in)h

Question 21

power, time taken and work done

Answer 21

P=W/t

Question 22

density, mass and volume

Answer 22

density=m/v

Question 23

area, force, pressure

Answer 23

p=F/A

Question 24

gravity, density, height and pressure difference

Answer 24

p=h x density x g

Question 25

(for a transformer): input(primary) voltage, output (secondary) voltage, no. of primary turns, no. of secondary turns

Answer 25

Vp/Vs=np/ns

Question 26

input power and output power

Answer 26

VpIp=VsIs