Angular velocity \( \omega \) is related to linear speed \( v \) by which expression?

1. Angular velocity \( \omega \) is related to linear speed \( v \) by which expression?

1. \( v = \omega r \)2. \( v = \frac{\omega}{r} \)3. \( \omega = \frac{v}{r^2} \)4. \( v = \omega^2 r \)