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40 Cards in this Set
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- Back
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Define Kinetic Energy
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The energy possessed by an object because of its motion, equal to one half the mass of the body times the square of its velocity
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Define Potential Energy
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the energy possessed by an object because of its position (in a gravitational or electric field), or its condition (as a stretched or compressed spring, as a chemical reactant, or by having rest mass)
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Provide the formula of Work (Constant Force, 1D)
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W=Fs
Work = (Force)*(Displacement) |
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Provide the formula of Work (Constant Force, 3D)
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W=(Displacement)(Useful component of Force)
W=(length of F parallel to the Displacement)*(Displacement) W=P*cos(angle)=F where P=Total force on the angle. |
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Define Friction
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A force that resists the relative motion or tendency to such motion of two bodies in contact
as F(max)=uN |
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whats the formula for Conservation of Energy
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KE + U(x) ((Final)) = KE + U(x) ((Initial))
Where U(x) = mgx + Constant Where KE = Half MV^2 |
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What is the formula for Potential Energy
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U(x) = mgx
or U(x) = Fx m = Mass g = Gravity F = Force x = Displacement |
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What is the formula for Hookes-Law Springs
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F = -kx
F = Force k = Stiffness in N/m x = Displacement The negative means force supplied by spring opposes both stretching (+ve x) and compression (-ve x) |
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Find the dot product of the vectors a.b
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vectors a.b = a1b1+a2b2+a3b3
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what is the formula for Finding the Angle between 2 vectors
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What is Degrees to Radians
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Degrees = Radians * 180/(pi)
or Radians = Degrees * (pi)/180 |
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What is the formula for Inelastic Collisions.
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m1v1+m2v2=MV(total)
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what is the formula for Elastic Collisions
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half MV squared(object 1) + Half MV Squared (object 2) = half MV squared(object 1) + Half MV Squared (object 2)
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Whats the Equation of Mass on a spring?
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a=-k/m*x
k= Spring tension m= mass x= Displacement |
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Mass on a spring under gravity
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Loaded Equil = D0 = mg/k
m = mass g= gravity k = Spring tension N/m |
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Simple Harmonic Motion Formula with relation to a spring.
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A=Amplitude
k=Spring Tension m = mass t=time |
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"Shine" is equal to?
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sinh x = (e^x - e^-x)/2
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"cosh" is equal to?
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cosh x = (e^x + e^-x)/2
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"than" is equal to?
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tanh = sinh x/cosh x
=(e^x - e^-x)/ (e^x + e^-x) |
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Expand cosh(A+B) =
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coshAcoshB + sinhAsinhB
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Expand sinh(A+B) =
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sinhAcoshB + coshAsinhB
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tanh(A+B)
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tanhA + tanhB
1 + tanhAtanhB |
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find the max voltage or the root means squared (RMS)
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Vrms = Vmax / square root of 2
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find the average Power in a circuit
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Pavg = Vrms^2 / R
or Pavg = Irms^2 * R |
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area of a 3d triagle.
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find the cross product and times by 0.5
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What is the formula for flux density
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D=(psi)/A
D=Fluz density (psi)=Electron Flux A=Area |
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Find the electric field strength
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E=F/Q2
E=Electric field Strength F=Force exerted on a small positive charge Q2=Positive test charge |
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find the force between 2 charges
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F=kQ1Q2/r^2
F=Force k= constant = 8.99x10^9 Nm^2C^-2 Q1=Charge 1 R= Distance. |
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whats the phrase to determine the different between a inductor and a Capacitor
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ELI the ICE man.
L (inductor) the e leads the i therefore leading current by 90 and c (capacitor) the I leads the energy (voltage) |
Define the charge value of a capacitor after a period of time.
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Vb=Voltage base
t=time tau=RC (R=resistance, C=capacitance) |
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how is the capacitance of capacitor determined.
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What is the relationship of current as a capacitor charges.
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What is the current charge of capacitor
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Plot the gain and phase of the output signal for a filter
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fc = Gain, once less than 7.07 the signal is "cut off"
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When a circuit with an inductor is switched off suddenly explain what happens.
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The inductors magnetic field "collapses" and all the "stored" energy is released causing a massive energy spike in reverse direction.
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What is the relationship of current through a inductor in relation to time.
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What is the relationship of current through a inductor in relation to time.
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.
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Calculate the impedance and capacitor in a circuit.
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Note: the capacitor has negative values of j while the inductor has positive values. It is the exact opposite. there is a frequency where they are equal.
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