A force of P = 20 N is applied to the cable, which causes the 175-kg reel to turn without slipping on the two rollers A and B of the dispenser. Neglect the mass of the cable. Each roller can be considered as an 18-kg cylinder, having a radius of 0.1 m. The radius of gyration of the reel about its center axis is kg = 0.42 m. (Figure 1) Part A Determine the angular velocity of the reel, measured counterclockwise, after it has made two revolutions starting from rest. Express your answer in radians per second to three significant figures. Enter positive value if the angular velocity is counterclockwise and negative value if the angular velocity is clockwise. ► View Available Hint(s)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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**Educational Content on Angular Velocity Problems**

**Problem Description:**

A force of \( P = 20 \, \text{N} \) is applied to the cable, which causes the 175-kg reel to turn without slipping on the two rollers \( A \) and \( B \) of the dispenser. Neglect the mass of the cable. Each roller can be considered as an 18-kg cylinder, having a radius of 0.1 m. The radius of gyration of the reel about its center axis is \( k_G = 0.42 \, \text{m} \).

**Objective:**

Determine the angular velocity of the reel, measured counterclockwise, after it has made two revolutions starting from rest.

**Instructions:**

- Express your answer in radians per second to three significant figures.
- Enter a positive value if the angular velocity is counterclockwise and a negative value if the angular velocity is clockwise.

**Diagram Explanation:**

The diagram shows:
- A reel with a radius of 500 mm, placed such that it touches two rollers, labeled \( A \) and \( B \), which are 400 mm apart.
- The force \( P \) is applied at a \( 30^\circ \) angle to the horizontal.
- The center of gravity \( OG \) is indicated at the center of the reel.

**Interactive Input:**

- The field provided for input (\( \omega \)) allows for units in radians per second.
- Upon submission, if the input is incorrect, feedback is provided with a number of attempts remaining.

In the attempt shown, an angular velocity of \( 1.775 \, \text{rad/s} \) was entered but marked incorrect, with 2 attempts remaining to find the correct solution.

*Note: Make sure to review rotational dynamic principles and conservation of angular momentum as needed for correct solutions.*
Transcribed Image Text:**Educational Content on Angular Velocity Problems** **Problem Description:** A force of \( P = 20 \, \text{N} \) is applied to the cable, which causes the 175-kg reel to turn without slipping on the two rollers \( A \) and \( B \) of the dispenser. Neglect the mass of the cable. Each roller can be considered as an 18-kg cylinder, having a radius of 0.1 m. The radius of gyration of the reel about its center axis is \( k_G = 0.42 \, \text{m} \). **Objective:** Determine the angular velocity of the reel, measured counterclockwise, after it has made two revolutions starting from rest. **Instructions:** - Express your answer in radians per second to three significant figures. - Enter a positive value if the angular velocity is counterclockwise and a negative value if the angular velocity is clockwise. **Diagram Explanation:** The diagram shows: - A reel with a radius of 500 mm, placed such that it touches two rollers, labeled \( A \) and \( B \), which are 400 mm apart. - The force \( P \) is applied at a \( 30^\circ \) angle to the horizontal. - The center of gravity \( OG \) is indicated at the center of the reel. **Interactive Input:** - The field provided for input (\( \omega \)) allows for units in radians per second. - Upon submission, if the input is incorrect, feedback is provided with a number of attempts remaining. In the attempt shown, an angular velocity of \( 1.775 \, \text{rad/s} \) was entered but marked incorrect, with 2 attempts remaining to find the correct solution. *Note: Make sure to review rotational dynamic principles and conservation of angular momentum as needed for correct solutions.*
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