Question

Can anyone help me find the speed of B in this rodsystem?
http://i.stack.imgur.com/i0fV9.png

Answer 1

$$|OA| = |BC| = 0.30m, |AB| = 0.40m, \omega = 15rad/s, v_c = 4.5m/s$$

Answer 2

One solution I have says that the compound speed of B around both O and A (with a second coordinate system moving along with OA) must be equal to the speed of B relative to C, which seems wrong to be as I think it should be equal to the actual speed of B in the global .

Answer 3

Another solution I have uses the fact that the angular velocity of OA is equal to the angular velocity of BC. It says you can see this from the image alone. I also don't see how that s the case.

Answer 4

*global coordinate system