# Circular Motion

Circular Motion and Centripetal Force.

Tip: This isn't the place to ask a question because the teacher can't reply.

## Key Questions

• It depends what information you begin with.

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

## Questions

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