An open cylindrical vessel, having its axis vertical, is 100 mm diameter and 150 mm deep and is exactly two-thirds full of water. If the vessel is rotated about its axis, determine at what steady angular velocity the

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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**Problem Statement:**

An open cylindrical vessel, having its axis vertical, is 100 mm in diameter and 150 mm deep and is exactly two-thirds full of water. If the vessel is rotated about its axis, determine at what steady angular velocity the water would just reach the rim of the vessel.

---

In this problem, we need to calculate the angular velocity required for the water in a rotating cylindrical vessel to reach the rim. The key parameters given are:

- Diameter of the vessel: 100 mm
- Depth of the vessel: 150 mm
- Vessel filled to two-thirds of its height with water

The task involves understanding the relationship between the centripetal force created by rotation and the height the water reaches. It's a classical problem involving centripetal acceleration, fluid dynamics, and rotational motion.

**Analysis Approach:**

1. **Calculate the Initial Height of Water:**
   - Initial water height = (2/3) * 150 mm

2. **Understand the Effect of Rotation:**
   - As the vessel rotates, the water will rise along the sides.
   - The water reaches the maximum height at the rim of the vessel when rotational forces balance gravitational forces.

3. **Use Physics Principles:**
   - Apply the concepts of angular velocity and centripetal force.
   - Use the formula for centripetal acceleration and equate it to gravitational force to find the desired angular velocity.

By solving these physics-based equations, students can determine at what angular velocity the water will just reach the rim without spilling over. This setup provides a practical understanding of rotational dynamics and fluid behavior.
Transcribed Image Text:**Problem Statement:** An open cylindrical vessel, having its axis vertical, is 100 mm in diameter and 150 mm deep and is exactly two-thirds full of water. If the vessel is rotated about its axis, determine at what steady angular velocity the water would just reach the rim of the vessel. --- In this problem, we need to calculate the angular velocity required for the water in a rotating cylindrical vessel to reach the rim. The key parameters given are: - Diameter of the vessel: 100 mm - Depth of the vessel: 150 mm - Vessel filled to two-thirds of its height with water The task involves understanding the relationship between the centripetal force created by rotation and the height the water reaches. It's a classical problem involving centripetal acceleration, fluid dynamics, and rotational motion. **Analysis Approach:** 1. **Calculate the Initial Height of Water:** - Initial water height = (2/3) * 150 mm 2. **Understand the Effect of Rotation:** - As the vessel rotates, the water will rise along the sides. - The water reaches the maximum height at the rim of the vessel when rotational forces balance gravitational forces. 3. **Use Physics Principles:** - Apply the concepts of angular velocity and centripetal force. - Use the formula for centripetal acceleration and equate it to gravitational force to find the desired angular velocity. By solving these physics-based equations, students can determine at what angular velocity the water will just reach the rim without spilling over. This setup provides a practical understanding of rotational dynamics and fluid behavior.
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