Physics required equations Flashcards
Unit 1
What is the equation for Kinetic energy?
1/2 x mass x speed^2
Ek = 1/2mv^2
Unit 1
What is the equation for gravitational potential energy?
mass x gravitational field strength x height
Ep = mgh
Unit 1
What are the equations for Power?
- Work done/time taken
- energy transferred/time taken
P = W/t = E/t
Unit 1
What are the equations for effeciency?
- effeciency = useful energy output/total energy input
- effeciency = useful power output/total power input
No symbol equation
Unit 1
What is the equation for elastic potential energy?
1/2 x spring constant x (extension)^2
Ee = 1/2ke^2
Given in exam
Unit 1
What is the equation for change in thermal energy?
change in thermal energy = mass x specific heat capacity x temperature change
ΔE = mcΔθ
Given in exam
Unit 2
What is the equation for charge?
charge = current x time
Q = It
Unit 2
What is the equation for potential difference
Potential difference = current x resistance
V = IR
Unit 2
What are the equations for power
- power = current x potential difference
- power = (current)^2 x resistance
P = IV = (I^2) R
Unit 2
What are the equations for energy transferred?
1.energy transferred = power x time
2.energy transferred = charge x potential difference
E = Pt = QV
Unit 3
What is the equation for density?
density = mass/volume
𝜌 =𝑚/𝑉
UNIT 3
What is the equation for thermal energy required for a change in state?
thermal energy for a change in state = mass x specific latent heat
E = mL
Given in exam
UNIT 3
What is the equation for finding pressure (gas)
pressure x volume = constant
pV = constant
Given in exam
UNIT 6
What is the equation for wave speed?
wave speed = frequency x wavelength
v= f𝜆
UNIT 6
What is the equation for time period?
Time period = 1/frequency
T = 1/f
Given in exam
UNIT 5
What is the equation for weight?
Weight = mass x gravitational field strength
W = mg
UNIT 5
What is the equation for work done
work done = force x distance(moved in direction of force)
W = Fs
UNIT 5
What is the equation for force
force = spring constant x extension
F = ke
UNIT 5
What is the equation for the moment of a force?
moment of force = force x distance (perpendicular to the direction of the force)
M = Fd
UNIT 5
What is the equation for pressure?
pressure = force perpendicular to surface/area of surface
p = F/A
UNIT 5
What is the equation for distance?
distance = speed x time
s = vt
UNIT 5
What is the equation for acceleration?
1.acceleration = change in velocity/time taken
𝑎 =Δ𝑣/𝑡
UNIT 5
what is the equation for resultant force ?
resultant force = mass x acceleration
F = ma
UNIT 5
What is the equation for momentum?
momentum = mass x velocity
p = mv
UNIT 5
What is the equation for liquid pressure?
pressure = height of column x density of liquid x gravitational field strength
p = hpg
Given in exam
UNIT 5
True or false: (final velocity)^2 - (initial velocity)^2 = 2 x acceleration x distance
I dont know what this is
TRUE!!
v^2 - u^2 = 2as
Given in exam btw
UNIT 5
What is the equation for force
given in exam
Force = changte in momentum/time taken
F = mΔv/t
given in exam
UNIT 7
What is the equation for force
UNIT 7!
Force = magnetic flux density x current x length of conductor in magnetic field
F = BIl
Given in exam
UNIT 7
T or F: potential difference across primary coil/potential difference across secondary coil = number of turns in primary coil/number of turns in secondary coil.
Vp/Vs = Np/Ns
TRUE
Vp/Vs = Np/Ns
Given in exam
