\\(undefined\\) \\(undefined\\) In the instant shown, point A is moving at V= 18
ID: 1863106 • Letter: #
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(undefined) In the instant shown, point A is moving at V= 18i-3j m/s and w_(AB)=1 rad/s counterclockwise. Point A is .4 m behind and .4 m above point B, and bar BC is .85 m long. What is w_(BC) and what are the coordinates of the instantaneous center of rotation of bar AB? Angle theta = 135 degrees.
In the instant shown, point A is moving at V= 18i-3j m/s and w_(AB)=1 rad/s counterclockwise. Point A is .4 m behind and .4 m above point B, and bar BC is .85 m long. What is w_(BC) and what are the coordinates of the instantaneous center of rotation of bar AB? Angle theta = 135 degree s.Explanation / Answer
Va = r(B/C)j X wBCk + r(A/B) X wAB
18i - 3j = 0.85*wBC i + (-0.4i - 0.4j) X -1k
18i - 3j = 0.85wBC i - 0.4j + 0.4i
18 = 0.85wBC + 0.4
wBC = 20.7rad/s
Instantaneous axis of rotation = (0, 2.8)
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