Rotational Motion Principles: Help and Review Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1.

Which of the following is NOT one of the big 5 equations for rotational motion with a constant acceleration?

(Note: In the images below, w0 is the initial angular velocity, and w is the final angular velocity. This is another way of notating the same thing, which you may well see in problems and tests.)

Question 2 2. Why is it easier to open a door by pushing a long way from the hinge?

Question 3 3. Which of the following is a correct definition of rotational motion?

Question 4 4. A mass of 3 kilograms, and a mass of 6 kilograms are placed at different points on a seesaw until they balance perfectly. If the 3 kilogram mass is 0.5 meters from the pivot point, how far away is the 6 kilogram mass?

Question 5 5. If a force of 10 newtons is applied at a distance of 5 meters from a pivot point, what torque does this produce?

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Question 6 6. What is the definition of angular velocity?

Question 7 7. A planet is orbiting a star in a perfect circle. It has a velocity of 4x10^4 m/s, a mass of 3 x 10^24 kg. If at a particular moment it's orbiting at a radius of 2 x 10^11 meters, how much angular momentum does it have?

Question 8 8. Which of the following people has the most linear momentum?

Question 9 9. Which of the following is a full and correct definition of angular momentum?

Question 10 10. Which of the following is a correct definition of moment of inertia?

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Question 11 11. If you hold a stack of heavy books for 10 minutes, are you doing work, and why?

Question 12 12. A spinning top increases the rate at which it spins from 5 radians per second, at an angular acceleration of 3 radians per second per second. If it continues to accelerate for 4 seconds, what will the final angular velocity be?

Question 13 13. Which of the following is a correct definition of torque?

Question 14 14. Which of the following is an example of an object experiencing translational motion?

Question 15 15. A merry-go-round is pushed with a torque of 500 newton-meters, around an angle of 2-pi radians. How much work is done in this process?

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Question 16 16. Which of the following is the rotational version of Newton's 2nd Law?

Question 17 17. Which of the following is an example of an object experiencing rotational motion?

Question 18 18. Imagine a ball rolling down a hill without friction. To measure the moment of inertia, which of the following is NOT a measurement you would need to take (or figure out)?

Question 19 19. What is the difference between kinematics and dynamics?

Question 20 20. Which of the following is a correct definition of moment of inertia?

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Question 21 21. What is rotational kinetic energy?

Question 22 22. Which of the following is NOT a rotational quantity used in physics?

Question 23 23. Which of the following is NOT an example of torque in the real-world?

Question 24 24.

Use the following data from a repeat of the ball experiment, to figure out the moment of inertia of a second ball:

Mass of the ball: 1 kg.

Radius of the ball: 0.02 meters.

Height of the hill: 0.3 meters.

Translational velocity at bottom: 2.2 m/s

Rotational velocity at bottom: 80 rads/s

Question 25 25. A planet is orbiting a star in a wildly elliptical orbit. The planet has a mass of 3 x 10^4 kilograms, a velocity of 3 x 10^3 meters per second, a radius of 7 x 10^13 meters, and is orbiting at an angle of 70 degrees to the star. When the planet reaches its closest point of approach, at a radius of 2 x 10^12 meters, and an angle of 90 degrees, approximately how fast will it be moving?

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Question 26 26. Instead of mass (used in translational motion), what do we use in the equation for rotational kinetic energy instead?

Question 27 27. Which of the following is NOT a rotational variable?

Question 28 28. A spinning top is spun at an angular velocity of 3 radians per second, by applying a torque of 10 newton-meters. How much power is being transferred to the spinning top?

Question 29 29. Which of the following defines inertia?

Question 30 30. What is the definition of conservation of momentum?

Rotational Motion Principles: Help and Review Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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