Equation List Constant Velocity x = position v=x/t Δ x = vaverage t
Physics - Berg t = time xf - xo = Δ x vaverage = (vo + vf ) / 2
Accelerated Motion a = acceleration v f = v0 + a t (vf ) 2 = (vo )2 + 2 a Δx
xo = original position x = xo + vt
a=v/t a = (vf – vo)/ t 2 Δ x = vo t + ½ a t Δ x = ½ (vf + vo ) t Acceleration due to gravity on Earth = 9.8 m/s 2
Forces And Newton’s Laws F = force m = mass Tan θ = Opposite side / Adjacent side Sin θ = Opposite side / hypotenuse Cos θ = Adjacent side / hypotenuse Fnet = m a Fg = m (9.8 m/s2) Ff = μk Fn Ff ≤ μs Fn
Opposite side
θ k = spring constant μs > μk
Ft = m v p = mv
Energy E = energy Work = (Force)(distance)
Adjacent side
F = k x (Hooke’s Law)
r = radius (distance) Fc = (m v2)/ r G = 6.67 x 10-11 Nm2 / kg2
Ft = impulse Va – Vb = Vb’ – Va’
Ek = ½ mv 2 Power = change in Energy/ time
Static Electricity Felectric = electric force q = charge 2 Felectric = (k q1 q2) / r k = 9x10 9 Nm2 / c2 E = V / d (parallel plates = constant field) V = Eelectric / q V x q = Eelectric Electric Circuits R = resistance R = R1 +R2 + R3 + … P = IV 1 kWh = 3,600,000 J
v = vf – vo
hypotenuse
Circular Motion and Universal Gravitation ac = centripetal acceleration Fc = centripetal force 2 ac = v / r Fc = ( 42 r m )/ T2 v = 2r / T Fg = (G m1 m2)/ r2 Momentum p = momentum (p)before = (p)after
v = velocity xf = final position
r = distance
V = voltage I = current 1/R = 1/R1 +1/R2 + 1/R3 + … P = I2R P = V2 / R v = I (R + r)
Eg = mgΔy Ee = ½ kx2 Power = work / time
E = Electric Field E = Fe / q Eelectric = Electric Potential Energy Eelectric = Fe x distance
P = Power V= IR
Mechanical Waves, SHM and Sound λ = wavelength f = frequency Speed = λf Speed = λ / T Speed of sound = 331 m/s + 0.6 m/s/ºC (temp) f'’ = f (vwave v obs) / (vwave ∓ vsource) T = 2(L/g) T = 2(m/k)
T = period f = 1/ T T = 1/f f beat = f1 – f2
Optics n = index of refraction n = (speed of light in vacuum / Speed of light in material) n1 sini = n2 sint i = r Speed of light = 3x 10 8 m/s f = focal length do = object distance di = image distance M = magnification factor ho = object height hi = image height 1/f = 1/do + 1/di M = -di / do = hi/ ho sin = / b (single slit interference) b =slit width d sin = m (constructive Interference) m = 0,1,2,3,4… d = distance between slits d sin = (m+ ½) (destructive Interference) Thermal Physics Q = Thermal Energy c = specific heat T = temperature (K) Hf = Heat of Fusion Hv = Heat of Vaporization Pressure = force/ area Q = mcΔT Q = mHf Q = mHv PV = nrT Constants Csilver = 230 J / kg K Csteam = 2010 J/ kg K Cice = 2100 J/ kg K Cwater = 4180 J / kg K Ccopper = 390 J / kg K Ciron = 450 J / kg K Cglass = 840 J / kg K CAluminum = 900 J/kg K Clead = 130 J / kg K Cprotein = 1700 J / kg K Water Silver Iron
Forces And Newton's Laws. F = force m = mass. Tan θ = Opposite side / Adjacent side. Sin θ = Opposite side / hypotenuse. Cos θ = Adjacent side / hypotenuse.
Momentum. p = momentum F t = m v F t = impulse. (p)before = (p)after p = mv Va â Vb = Vb' â Va'. V1,f = [(m1 - m2) / (m1 + m2)] V1,0 V2,f = [(2m1) / (m1 + m2)] V1,0. Energy. E = energy Ek = 1â2 mv 2 Eg = mgÎy Ee = 1â2 kx2. Work = (Force)(d
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Centripetal Acceleration ac = r ⢠Ï2 = v2 ÷ r = (4 Ï2 r) ÷ T2. Centripetal Force. Fnet = m ⢠ac = m ⢠r ⢠Ï2 = m ⢠(v2 ÷ r ). Newton's Law of Universal. Gravitation.
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