**Topic: Mechanics of a Wrecking Ball**Wrecking balls are used to demolish old buildings. Consider a 720 kg steel ball suspended from a 10-meter-long cable on a crane. A hook on the crane slowly pulls the ball back and then releases it. The ball’s speed at the lowest point in its arc, just before striking the building, is 4.5 m/s.---**Part A: Conceptual Question**At the lowest point in the ball’s arc:- The tension in the cable is less than \( mg \) because the ball is moving down.- The tension in the cable is equal to \( mg \) because tension and gravity are the only forces and they balance.- The tension in the cable is greater than \( mg \) because there has to be a net upward force.**Action:** Submit your answer and request a detailed explanation if needed.---**Part B: Calculation Question**What is the tension in the cable when the ball is at its lowest point? Express your answer with the appropriate units.- **Hint Available:** A hint is accessible to help guide you through the process of determining the tension in the cable.**Equation Field:**\[ T = \text{Value} \ \text{Units} \]**Action:** Input your calculated value and submit your answer for verification.--- This exercise involves understanding the dynamics of forces acting on a wrecking ball and calculating the tension in the supporting cable based on the given conditions.

Answered: Image /qna-images/answer/4b1cc53a-161e-4fee-8f6f-182e6986eb4c.jpg

Wrecking balls are used to demolish old buildings. A 720 kg steel ball is suspended from a 10-m-long cable on a crane. A hook on the crane slowly pulls the ball back, then releases it. The ball's speed at the lowest point in its arc, just before striking the building, is 4.5 m/s. At the lowest point in the ball's arc, O the tension in the cable is less than mg because the ball is moving down. O the tension in the cable is equal to mg because tension and gravity are the only forces and they balance. O the tension in the cable is greater than mg because there has to be a net upward force. Submit Part B Request Answer What is the tension in the cable when the ball is at its lowest point? Express your answer with the appropriate units. ▸ View Available Hint(s) Submit HA T= Value Units ?

Wrecking balls are used to demolish old buildings. A 720 kg steel ball is suspended from a 10-m-long cable on a crane. A hook on the crane slowly pulls the ball back, then releases it. The ball's speed at the lowest point in its arc, just before striking the building, is 4.5 m/s. At the lowest point in the ball's arc, O the tension in the cable is less than mg because the ball is moving down. O the tension in the cable is equal to mg because tension and gravity are the only forces and they balance. O the tension in the cable is greater than mg because there has to be a net upward force. Submit Part B Request Answer What is the tension in the cable when the ball is at its lowest point? Express your answer with the appropriate units. ▸ View Available Hint(s) Submit HA T= Value Units ?

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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Concept explainers

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

Question

**Topic: Mechanics of a Wrecking Ball**

Wrecking balls are used to demolish old buildings. Consider a 720 kg steel ball suspended from a 10-meter-long cable on a crane. A hook on the crane slowly pulls the ball back and then releases it. The ball’s speed at the lowest point in its arc, just before striking the building, is 4.5 m/s.

---

**Part A: Conceptual Question**

At the lowest point in the ball’s arc:

- The tension in the cable is less than \( mg \) because the ball is moving down.
- The tension in the cable is equal to \( mg \) because tension and gravity are the only forces and they balance.
- The tension in the cable is greater than \( mg \) because there has to be a net upward force.

**Action:** Submit your answer and request a detailed explanation if needed.

---

**Part B: Calculation Question**

What is the tension in the cable when the ball is at its lowest point? Express your answer with the appropriate units.

- **Hint Available:** A hint is accessible to help guide you through the process of determining the tension in the cable.

**Equation Field:**

\[ T = \text{Value} \ \text{Units} \]

**Action:** Input your calculated value and submit your answer for verification.

---

This exercise involves understanding the dynamics of forces acting on a wrecking ball and calculating the tension in the supporting cable based on the given conditions.

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