国上清大峰 o=i2+j(-1)+k4(rad1s). Vector cross product: r=i(-1)+j10+k2(mm), A=iAs jA,+kA. B=iB +jBy+kB. =i(-2-40)+j-4-4)+k(20-1) i jk =i(-42)+j-8)+k19)mm/s A×B=AA,A BB B. AxB=i(A,B.-A.B)+j(A.B,-AB.)+k(A,B-A,B, A×B=ABsin0 圆上清夫大学 Vector dot product: A[B=ABcos0 Angle 0 is the smallest angle between the two vectors and is always in a range of0°to180°ω  i2  j(1)  k4 (rad / s). r  i(1)  j10  k2 (mm), mm s B B B A A A x y z x y z ( 42) ( 8) (19) / ( 2 40) ( 4 4) (20 1) 1 10 2 2 1 4 i j k i j k i j k i j k υ ω r                    ω r v Ax Ay A z A  i  j  k Bx By B z B  i  j  k Vector cross product: x y z x y z B B B A A A i j k AB  ( ) ( ) ( )   AyBz  AzBy  AzBx  AxBz  AxBy  AyBx A B i j k A B  ABsin Vector dot product: A B￾  ABcos Angle  is the smallest angle between the two vectors and is always in a range of 0º to 180º