Circular Motion Homework
Name_______________________________
Read pg. 2234-5 and answer the following:
1. What is circular motion?
2. What is the axis of rotation?
3. What is tangential speed and what does it depend on?
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9.
When the tangential speed is constant, the motion is described as________________________.
On a carousel, which horse has a greater tangential speed, one on the inside or one on the outside?
What is centripetal acceleration due to?
What is the equation for the magnitude of centripetal acceleration?
What direction is centripetal acceleration?
What does the word centripetal mean?
Read through Sample problem A and write down the equation used to solve for vt:
Do Practice A problems 1 and 3 Below: Make sure to start with you knowns and unknowns and your final
equation—Please write neatly so I can help you!!
Read pg 236 to 237 and answer the following:
1. How does tangential acceleration differ from centripetal?
2. Draw the force diagram of the ball on a string that is on a horizontal path.
3. Where is the net force directed?
4. What is the equation of centripetal force (the net force of an object in circular motion)?
5. Read Sample problem B: Show how you can rearrange the centripetal force equation to solve for mass:
Do practice B problems 1 and 3 below:
Read pg 238-9 and answer the following:
1. Why is centrifugal force considered an incorrect term by most physicists?
2. Why is inertia misinterpreted as a force?
3. Read the Conceptual challenge and answer the questions about pizza and swings:
Section review pg 239 do questions #1,3 and 5