9. Consider a 1-kg brick being whirled in a vertical circle at the end of 1-meter rope. a. What critical velocity must the brick achieve in order to pass safely through the top of its circular path? b. What is the tension in the rope as it is passing through the top of its circular path? How would the critical velocity of the brick be if it were to be whirled on the C. moon where the acceleration due to gravity is 1/6th that on earth?

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Hi , can I get some help with those practice questions? I’m stuck. Can you please explain the process . thank you
**Physics Problem Set—Circular Motion and Weightlessness**

---

**9. Problem: Whirling a Brick in a Vertical Circle**

Consider a 1-kg brick being whirled in a vertical circle at the end of a 1-meter rope.

a. **Critical Velocity**: What critical velocity must the brick achieve to pass safely through the top of its circular path?

b. **Tension in the Rope**: What is the tension in the rope as it is passing through the top of its circular path?

c. **Critical Velocity on the Moon**: How would the critical velocity of the brick be if it were to be whirled on the moon, where the acceleration due to gravity is \( \frac{1}{6} \) that on Earth?

---

**10. Problem: Experiencing Weightlessness While Driving**

While driving to work, you pass over a "crest" in the road that has a radius of 30 meters.

*Diagram Description*: The diagram shows a vehicle passing over a curved path with a radius of 30 meters.

a. **Speed for Apparent Weightlessness**: How fast would you need to be traveling to experience apparent "weightlessness" while passing over the crest?

---
Transcribed Image Text:**Physics Problem Set—Circular Motion and Weightlessness** --- **9. Problem: Whirling a Brick in a Vertical Circle** Consider a 1-kg brick being whirled in a vertical circle at the end of a 1-meter rope. a. **Critical Velocity**: What critical velocity must the brick achieve to pass safely through the top of its circular path? b. **Tension in the Rope**: What is the tension in the rope as it is passing through the top of its circular path? c. **Critical Velocity on the Moon**: How would the critical velocity of the brick be if it were to be whirled on the moon, where the acceleration due to gravity is \( \frac{1}{6} \) that on Earth? --- **10. Problem: Experiencing Weightlessness While Driving** While driving to work, you pass over a "crest" in the road that has a radius of 30 meters. *Diagram Description*: The diagram shows a vehicle passing over a curved path with a radius of 30 meters. a. **Speed for Apparent Weightlessness**: How fast would you need to be traveling to experience apparent "weightlessness" while passing over the crest? ---
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