1. The problem statement, all variables and given/known data Point O is fixed in space. Gear 1 has an angular velocity of 20k rad/s, and Gear 2 has an angular velocity of -10k rad/s. r1 = 0.3 m and r2 = 0.2 m. What is the angular velocity of the connecting arm OA, and what is the speed of A? Gear 1 is larger than Gear 2. Gear 1 is connected to point O and Gear 2 is connected to point A. 2. Relevant equations vA=vO + (wOA x rA/O) 3. The attempt at a solution w2=w1 + w2/1 -10k=20k+w2/1 w2/1=-30k vA=vO+(wOA x rA/O) vA=0 + -30k x .5i vA= -6j m/s The correct answer is 4j m/s. I think I am using the right equations but I am not fully understanding the concept of relative velocity when different bodies are in effect. Can someone please explain this problem to me? Thank you.