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Kinematics - relative velocities

  • Thread starter srh
  • Start date
srh
7
0
1. Homework Statement

I have attached a picture of the situation. Small Wheels attached to the ends of rod AB roll along two surfaces. Knowing that at the instant shown the velocity vA of wheel A is 1.5 m/s to the right and the relative velocity vB/A of wheel B with respect to wheel A is perpendicular to rod AB, determine the relative velocity vB/A and velocity vB of wheel B.


2. Homework Equations
vA+vB/A=vA


3. The Attempt at a Solution

I understand that vA+vB/A =vA. I know that the component of vA is 1.5m/s in the x direction. The problems that we have done were all with right angles. I know another way to figure out the problem is to draw the vectors but we don't have all the angles. I can't seem to figure out how to find the angle that the rod AB makes w/ the x-axis. Is there a formula that I am missing? I'm just not sure where to start.
 

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Answers and Replies

radou
Homework Helper
3,104
6
This thread belongs to the homework section.

You should do some google-ing on vectors and learn more, instead of thinking about missing formulas. Btw, you can solve this graphically too, of course.
 

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