Equations Flashcards
State the Suvat equations
- s = (u+v)t / 2
- a = v-u / t
- s = ut + 1/2at2
- v2 = u2 + 2as
State the Forces equations
- F = ma
- g = F / m
- W = mg
- Moment = Fd
- F = mv - mu / t
State the momentum equations
- p = mv
- m1v1 = m2v2
- Change in p of one object = final p - initial p
State the Work, Energy and Power equations
- W = Fd
- KE = 1/2mv2
- GPE = mgh
- P = E/t
- P = W/t
- Efficiency = useful E output / Total E input
- Efficiency = useful P output / Total P input
- P = Fv
What is the equation for p.d?
- V = E/Q
What is the resitance equations?
- R = V/I
- RT = R1 + R2
- 1/RT = 1/R1 + 1/R2
What are the equations for electrical power, energy and efficiency?
- P = IV
- P = I2R
- P = V2/R
- W = IVt
What is the resistivity equation?
- R = pl / A
What is the equation for current?
- I = Q/t
- I = nAve
What is the density equation
- p = m / V
What is Stokes law equation?
- F = 6πnrv
What is Hooke’s Law equation?
- F = kx
What is the pressure equation?
- p = F / A
What are Youngs modulus equations?
- Stress = F / A
- Strain = extension / length
- Youngs modulus = Stress / Strain
What is the equation for elastic strain energy?
- Eel = 1/2Fx
What is the equation for wave speed?
- v = frequency * wavelength
What is the equation for speed of a transverse wave on a string?
- v = (T/μ)1/2
What is the equation for intensity of radiation?
- I = P / A
What are the equations for power of a lens?
- P = 1/f
- P = P1 + P2 + P3 +…
What is the thin lens equation?
- 1/u + 1/v = 1/f
What is the magnification of a lens question?
m = v/u
What is the equation for a diffraction grating?
- nλ = dsin(x)
What is the equation ofr refractive index?
- n1sin(x)1 = n2sin(x)2
What is the equation with KE and momentum?
- Ek = p2/2m
