00:01
We'd like to solve this problem using the instant center of zero velocity.
00:06
And we're given omega cd is equal to four radiance per second, we'd like to find the angular velocities of ab and cd.
00:16
So let's, here i've drawn just the image without putting all of the lengths, but i'm going to draw the velocity components.
00:23
Here is our velocity component for c and our velocity component for b.
00:31
We can calculate our velocity components.
00:35
Tangent of this angle 30 degrees is equal to length c .i.
00:40
Divided by length b .c.
00:42
So c .i is 0 .4 times tangent of 30 degrees, which is 0 .230 meters.
00:50
Now we also have cosine of 30 is equal to b .c.
00:55
Over b .i.
00:57
And here i'm just going to call this i.
00:59
So this is equal to 0 .462 meters.
01:02
So our velocity at c is cd times omega cd.
01:07
So we multiply 0 .5 times 4 to get 2 meters per second...