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# Unit 4: Uniform circular motion and gravitation

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## About this unit

How does the spin cycle on your clothes dryer get most of the water out? What causes planets to orbit in a circular motion? The answer to these questions lies in the forces behind circular motion. Dive into a vortex of centripetal force, centripetal acceleration, and Newton's law of gravitation.### Learn

### Practice

- Circular motion basics: Angular velocity, period, and frequencyGet 3 of 4 questions to level up!

### Learn

### Practice

- Predicting changes in centripetal accelerationGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 160 Mastery points

### Learn

### Practice

- Identifying centripetal forcesGet 3 of 4 questions to level up!

### Learn

### Practice

- Gravitational field strengthGet 3 of 4 questions to level up!
- Comparing gravitational and inertial massGet 3 of 4 questions to level up!

Level up on the above skills and collect up to 240 Mastery points

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Level up on all the skills in this unit and collect up to 500 Mastery points!