Notes 6.2: Circular Motion

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# Notes 6.2: Circular Motion - PowerPoint PPT Presentation

Notes 6.2: Circular Motion. Circular Motion – when a force causes an object to curve in a full circle. There are 2 types of circular motion to be familiar with: 1. Rotation – an object spins around an internal axis. Example: bike tire, figure skater

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### Notes 6.2: Circular Motion

Circular Motion – when a force causes an object to curve in a full circle.
• There are 2 types of circular motion to be familiar with:
• 1.Rotation – an object spins around an internal axis.
• Example: bike tire, figure skater
• Earth rotates once on it’s axis in 24 hours
2. Revolution – object moves around an external axis
• Example: rider on a carousel
• Earth revolves around the sun
We can describe circular speeds in 2 ways.
• 1. Angular speed – rate at which something turns (rpm)
• A CD spins at 200 rpm
• Units: m/s
Example: A CD takes 0.3 seconds to make one revolution. If the radius of the CD is 6 cm, how fast is a speck of dust on the outside of the CD moving?