- #1
mancity
- 21
- 2
- Homework Statement
- Two straight rods l1 and l2 are put on a piece of paper as shown in the figure. the angle between two rods is theta. What is the velocity of the crossing point A when l1 starts to roll with velocity v1? What about if l2 also starts to roll with velocity v2?
- Relevant Equations
- Vector decomposition
I apologize if this is a stupid question but how come we can't just say that for part (a) v_A = -v_1 j hat, and for (b) v_A=v2 sintheta i hat + (-v1-v2cos theta) j hat? i.e. how come we can't just do vector decomposition "normally"? I am especially confused about the given solution in (a) where there is an additional horizontal component of velocity in the i directioneven though v1 appears to only act in the j direction.
Thanks
Thanks