Engineering Formula Sheet



[pic]

|Engineering Formula Sheet |

| Circular Shapes |Electrical Systems |

| | |

|Formulas |Formulas |

|Variables |Variables |

| | |

|  |  |

|C = Circumference |V = Voltage |

| | |

|[pic] |V = IR |

|π = 3.14 |I = Current |

| | |

| |  |

|d = Diameter |R = Resistance |

| | |

|[pic] | |

|A = Area | |

| | |

|  | |

|r = Radius | |

| | |

|Right Triangle Ratios | |

|Formulas |Variables |

|[pic] | |

|[pic] |θ = Angle |

|[pic] | |

|Simple Machines |

|Formulas |Variables |

|[pic] |AMA = Actual Mechanical Advantage |

| |FR = Resistance force |

| |FE = Effort force |

|[pic] |IMA = Ideal Mechanical Advantage |

| |DR = Resistance Distance |

| |DE = Effort Distance |

|[pic] |LE = Length from fulcrum to effort |

| |LR = Length from fulcrum to resistance |

|Wheel and Axle [pic] |rw = Wheel radius |

| |ra = Axle radius |

|Pulley IMA = Total number of strands | |

|supporting the load | |

|Inclined Plane or Wedge [pic] |L = Slope length |

| |H = Height |

|Wedge [pic] |L = Slope length |

| |T = Thickness |

|[pic] |C = Circumference |

|[pic] [pic] |Pitch = Screw pitch |

| |TPI = Threads per inch |

|Properties of Materials |

|Formulas |Variables |

|[pic] |σ = Stress |

| |F = Axial force |

|[pic] |Ao = Cross-sectional area |

| |ε = Strain |

|[pic] |δ = Deformation |

| |Lo = Original length |

|[pic] |E = Modulus of Elasticity |

|[pic] | |

|Fluids |

|Formulas |Variables |

|[pic] |P = Pressure |

| |F = Force |

|[pic] |A = Area |

| |V = Volume |

|[pic] | |

|Gear Ratios |

|Formulas |Variables |

|[pic] |GR = Gear ratio |

| |ωin = Driver gear, rpm |

| |ωout = Driven gear, rpm |

|[pic] |Nin = Number of teeth on driver |

| |Nout = Number of teeth on driven |

| |din = Diameter of driver |

|[pic] |dout = Diameter of driven |

| |τin = Torque of driver, ft-lbs |

| |τout = Torque of driven, ft-lbs |

|Kinematics |

|Formulas |Variables |

|[pic][pic] |X  = Range |

| |Vi = Initial velocity |

|[pic][pic] |g = Acceleration due to gravity |

| |θ = Initial trajectory angle from the horizontal |

|[pic] |Vix = Initial horizontal velocity |

|[pic] |Viy = Initial vertical velocity |

|Statics | |

|Formulas |Variables |

|[pic] |M = Moment about a point |

| |F = Force |

| |[pic]d = Perpendicular distance |

|[pic] |∑ = Sum of |

| |X = Force in x-direction |

| |Y = Force in y-direction |

|[pic] |CCW = Counter-clockwise moment |

|[pic] |CW = Clockwise moment |

|[pic] |J = Number of joints |

| |M = Number of members |

| |R = Number of reaction forces |

|Rectangular Sections |[pic] |IXX = Moment of inertia about x-x axis |

|[pic] | |b = Base dimension |

| | |h = Height |

|Work and Power |

|Formulas |Variables |

|[pic] |W = Work |

| |F = Force |

| |D = Distance |

|[pic] |P = Power |

| |W = Work |

| |t = Time |

|[pic] |V = Volts |

| |I = Current |

|[pic] |P = Rate of heat transfer |

| |Q = Energy transfer |

| |Δt = Difference in time |

|[pic] |k = Thermal conductivity |

| |A = Area of thermal conductivity |

| |L = Thickness |

| |ΔT = Difference in temperature |

|[pic] |U = Thermal transmittance (U-factor) |

|[pic] |R = Resistance to heat flow (R-value) |

[pic]

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download