# Question 2555d

1. If frequency is known: $T = \frac{1}{f}$
2. If speed is known: T=(2πr)/v
3. If angular frequency is known: T=(2π)/ω
4. If you know the centripetal force, object's mass and radius of motion: Use $F = \frac{m {v}^{2}}{r}$ to find $v$ then use T=(2πr)/v
5. If you know the centripetal acceleration and radius of motion: Use $a = \frac{{v}^{2}}{r}$ to find $v$ then use T=(2πr)/v#