- The planet Tolboomonia has a circular orbit around a star in a far off galaxy. It is traveling at 1300 m/s. If it has a centripetal acceleration of 0.06 m/s^2, how far is it from the sun? (2.82e7 m, solution)
- Suzan is twirling a sling psychrometer (this actually exists) over her head. It has a mass of 0.5kg and she feels a force in her hand of 8N while she is swinging it. If she swings it with a radius of 1m, what is the tangential velocity of the psychrometer? (4 m/s, solution)
- Edgar is riding his tricycle around the gym. If he goes around the gym seven times in one minute, what is his period? (8.3 s, solution)
- What is the centripetal force required to make a 10kg object move in a circle of radius 5m with a period of 0.5s? (7890 N, solution)
- Paul is driving a 1230 kg sports car around a flat circular track. The track has a radius of 200m and it takes him 21 seconds to go around once. What is the coefficient of friction between the wheels and the road? (1.8, video)

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