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Important Equations for 12.3 contd....

washam13
washam13
Important Equations for 12.3 contd....
Jan 25 2011, 6:39 PM EST | Post edited: Jan 25 2011, 6:39 PM EST
directional angles
V-=V1 i + V2 j + V3 k
cos(alpha)= V1-/llV-ll cos(beta)= V2-/llV-ll cos(phi)= V3-/llV-ll

orthogaonal projections
projb- V-= (V-*b-/llb-ll^2)b-

work
PQ- (placement vector)
W=F-*PQ- = llF-ll llPQ-ll cos(theta)
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