# Dynamics problem: Crankshaft angular speed?

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1. Dec 4, 2016

### ramzerimar

1. The problem statement, all variables and given/known data

2. Relevant equations
Kinematic theorems:

3. The attempt at a solution

Ok, I'm trying to use another angle, phi, and find some relation betwen phi and theta so I can derive the equation for the angular velocity of rod B with respect to S, but I'm stuck at that point. How should I proceed with this problem?

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2. Dec 5, 2016

### Nidum

Hint : Use the x y coordinates of the crank pin .