Physics Flashcards
Average speed =
Distance / Time
V= d/t
Acceleration = ….
Acceleration = change in velocity / time taken for change
a= v-u /t
Force =
Force = mass X acceleration
F= mXA
Weight =
Weight = mass X gravitational field strength
W=mXg
Momentum =
Momentum = mass X Velocity
p=mv
Force =
Force = change in momentum / time
f= (mv-mu) /t
Orbital speed =
Orbital speed = 2 X Pi X orbital Radius / time period
Sum of clockwise moments =
Sum of clockwise moments = sum of anticlockwise moments
Work done =
Work done = force X distance moved in direction of force
W = F X d
Power =
Power = work done / time taken
P= W / t
Change in gravitational potential energy =
Change in gravitational potential energy = weight X change in vertical height
GPE = mgh
Kinetic energy =
Kinetic energy = 1/2 X mass X velocity^2
Ke= 1/2mv^2
Efficiency =
Efficiency = useful energy out / total energy supplied in
Efficiently = useful energy / total energy
Total energy before event =
Total energy before event = Total energy after event ( conservation of energy)
Charge =
Charge = current X time
Q=It
Voltage =
Voltage = current X resistance
V= IR
Power =
Voltage X current
Electrical energy =
Electrical energy = voltage X current X time
E= I t V
Voltage across coil =
Voltage across coil = number of turns on coil
Vs= Ns
Secondary coil output power =
Secondary coil output power = primary coil output power
Wave velocity =
Wave velocity = frequency X Wavelength
V = f X weird y
Frequency =
Frequency = 1 / time period
Refractive index =
Refractive index = sine of angle of incidence / sine of angle of refraction
n= sin i/ sin r
Sine of critical angle =
Sine of critical angle = 1/refractive index
Sin c = 1/n
Density =
Density = mass/volume
P= m/V
Pressure =
Pressure = Force / area
p= F/A
Pressure in liquid =
Pressure in liquid = liquid density X height of liquid X gravity
What’s Boyles law?
First pressure X first Volume = second pressure X second volume
What’s the pressure law ?
First pressure / first kelvin temperature = second pressure / second kelvin temperature
Stopping distance =
Stopping distance = thinking distance ➗ breaking distance
