COSMOS: Complete Online Solutions Manual Organization System
Chapter 3, Solution 16.
Have d = λ AB × rO/ A
where λ AB =
rB/ A
rB/ A
and rB/ A = ( −210 mm − 630 mm ) i
+ ( 270 mm − ( −225 mm ) ) j
= − ( 840 mm ) i + ( 495 mm ) j
rB/ A =
( −840 mm )2 + ( 495 mm )2
= 975 mm
Then λ AB =
=
− ( 840 mm ) i + ( 495 mm ) j
975 mm
1
( −56i + 33j)
65
Also rO/ A = ( 0 − 630 ) i + ( 0 − (−225) ) j
= − ( 630 mm ) i + ( 225 mm ) j
∴d =
1
( −56i + 33j) × − ( 630 mm ) i + ( 225 mm ) j
65
= 126.0 mm
d = 126.0 mm W
.