ALL EQUATIONS :DEVIL:

Question 1

Paper1: KE

Answer 1

KE = 1/2mv^2

Question 2

Paper1: GPE

Answer 2

GPE = mgh

Question 3

Paper1: Workdone

Answer 3

Work done = force * Distance

Question 4

Paper1: Power energy transfer

Answer 4

Power(Watts) = Energy transferred(Joules)/Time

Question 5

Paper1: Power for work done

Answer 5

P = Work done/time

Question 6

Paper1: Efficiency energy/power

Answer 6

useful energy output/total energy input for energy

and for power: useful power output / total power input

Question 7

Paper1: Charge flow

Answer 7

Q = It or Charge(Coulombs) = Current x time

Question 8

Paper1: Potential Difference

Answer 8

V = IR or Voltage = Current x Resistance

Question 9

Paper1: Power using voltage

Answer 9

P = VI or Power = Potential difference x current

Question 10

Paper1: Power using resistance

Answer 10

P = I^2 x R or current squared x resistance

Question 11

Paper1: Energy transferred using power

Answer 11

E = Pt or Energy transferred = Power x time

Question 12

Paper1: Energy transferred using charge

Answer 12

E = QV OR Energy transferred = Charge x Potential Difference

Question 13

Paper1: Density

Answer 13

p = m/V or Density(kg/m^3) = mass/ Volume

Question 14

Paper1: Specific Heat Capacity

Answer 14

E = mc0 or change in thermal energy = mass x specific heat capacity x temp change

Question 15

Paper1: Specific Latent Heat

Answer 15

E = mL or Energy transferred = mass x specific latent heat

Question 16

Paper1: weight

Answer 16

W = mg

Question 17

Paper1: Force (Hooke’s Law)

Answer 17

F = ke or Force = spring constant(N/m) x Extension

Question 18

Paper1: Moment of a force

Answer 18

M = Fd or Moment(Nm) = Force x Distance

Question 19

Paper1:Pressure for Liquids and Solids

Answer 19

Pressure in pascals = force / area

Question 20

Paper1:Pressure in a liquid

Answer 20

p = hpg or Pressure = depth x Density (kgm^3) x Gravitational field strength

Question 21

Paper1:Acceleration

Answer 21

Acceleration = Change in velocity/ Time

Question 22

Paper1:Newtons Second Law

Answer 22

F = ma

Question 23

Paper1:Momentum

Answer 23

P = mv or Momentum = mass(kg) x velocity(m/s)

Question 24

Paper1:Force(Momentum Change)

Answer 24

F = Change in momentum / Time

Question 25

Paper2: Distance, Speed, and Time

Answer 25

Speed = Distance/Time

Question 26

Paper2: Acceleration

Answer 26

Acceleration = Change in velocity/ time

Question 27

Paper2: Newton’s Second Law (Force, Mass, Acceleration):

Answer 27

Force = Mass x Acceleration

Question 28

Paper2: Momentum:

Answer 28

Momentum - mass x velocity

Question 29

Paper2: Force & Change in Momentum:

Answer 29

Force = Change in momentum / time

Question 30

Paper2: Wave Speed:

Answer 30

wave speed = frequency x wavelength or v=fλ

Question 31

Paper2: Period of a Wave:

Answer 31

1/frequency

Question 32

Paper2: Refractive Index (Snell’s Law)

Answer 32

n = sin i / sin r or the refractive angle = Angle of incidence / angel of refraction

Question 33

Paper2: Magnetic Force on a Current-Carrying Wire (Motor Effect):

Answer 33

F=BIL or Force = Magnetic field Strength(Tesla) x Current x Length of the wire

Question 34

Paper2: Transformer Equation:

Answer 34

Vp/Vs=Np/Ns V = Voltage N = Number of turns p = primary s = secondary

Question 35

Paper2: Power in Transformers (If 100% Efficient):

Answer 35

VpIp = VsIs V = Voltage p = primary s = secondary

Question 36

Paper2: Orbital Speed:

Answer 36

v = 2πr/ T v = orbital speed (m/s) T = orbital periods