gen x's latest activity
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gen x replied to the thread Is it dangerous if there is a mains fault on a potable water pipe?.But why we even need ground reference, if we have PE wire that return current back to transofrmer in case of fault? We have PE wire just... -
gen x replied to the thread Is it dangerous if there is a mains fault on a potable water pipe?.Does house need PE wire connect to earth in garden, if yes why?
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gen x replied to the thread Is it dangerous if there is a mains fault on a potable water pipe?.What mean grounding, connect pipe to ground wire(green or green-yellow wire) that coming from transformer or connect to Planet earth...
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gen x posted the thread Is it dangerous if there is a mains fault on a potable water pipe? in Electrical Engineering.Both the main electrical cable (three-phase, line to neutral=230V, line to line =400V, 50Hz) and the water supply line(ppr pipe) are...
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gen x replied to the thread Undergrad Why if net force=zero, moment at any point is same?.Why is vector r a/p (lever arm) not perpendicular to force F? moment of point P must be: Mp= lever arm perpendicular to force F x force F
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gen x replied to the thread Undergrad Why if net force=zero, moment at any point is same?.Net force=zero case: F1=10, F2=40, N=50 Moment at A=-10x2+40x1=+20Nm Moment at B= 10x2-50x4+40x5=+20Nm Net force = non zero: F1=10...
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Why as long net force= zero, moment at any point is the same but if net force= non zero, that is not case anymore? Here is simple...
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.ω=7.292×10−5 rad/s R=6.378×106 m earth rotate around point A(CoM): ameasured=g−ac ac=ω^2R...
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.sl(t)=(vt+lcos(ωt),lsin(ωt)) for t=0, cos0=1,sin0=0 sl(0)=(l,0) .... x=l Translational velocity as a function of x: vtrans=(v,0)...
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.How can rotation about points A, B and C be the same, acelometer placed on Earth will read different values? Rotation for points B and...
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.vl(t)=vtranslation+vrotation vtranslation=(v,0) vrotation=(−ωlsin(ωt),ωlcos(ωt)) total velocity of the point at position l...
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.Why is force frame dependent? If acceleration is the same, and m is the same then why F is not equal? ..F=ma
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.vl(t) =ω⋅l vl(t)=v
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.I thought maybe " r" of local curvature in specific point. Doesn’t the centripetal force have to be the same in both reference frames?
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gen x replied to the thread Undergrad Reference frames, center of rotation, etc.math: Cf=m x 0^2 /r = 0 Yes that is good question. point t1 has centripetal force to the right toward center for frame fixed to center...
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