A string, 0.750 m in length, is attached to a hook in the ceiling. A 0.600 kg mass is rotating around the vertical axis and the angle between the vertical axis and the string is 18°. a) Draw the free body diagram and kinetic diagram of the mass. b) Determine the tension in the string. c) Determine the velocity of the mass

College Physics
11th Edition
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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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**Problem Statement**

A string, 0.750 m in length, is attached to a hook in the ceiling. A 0.600 kg mass is rotating around the vertical axis and the angle between the vertical axis and the string is 18°.

Tasks:
a) Draw the free body diagram and kinetic diagram of the mass.
b) Determine the tension in the string.
c) Determine the velocity of the mass.

---

**Explanation**:

- **Free Body Diagram**: The diagram should show the mass suspended by the string at an angle of 18° from the vertical. Forces acting on the mass include the tension in the string (T) directed along the string and the gravitational force (mg) acting downward.

- **Kinetic Diagram**: This diagram should depict the rotational motion of the mass with centripetal force directed towards the axis of rotation.

- **Formulas**:
  - Use trigonometry to resolve the forces and determine the tension.
  - Use the centripetal force equation to calculate the velocity of the mass. 

**Mathematical Concepts**:

- Trigonometric relations such as sine and cosine for angles in resolving forces.
- Centripetal force equation: \( F_c = \frac{mv^2}{r} \), where m is mass, v is velocity, and r is the radius of the circular path.

In determining the calculations, consider how these concepts apply to the described system.
Transcribed Image Text:**Problem Statement** A string, 0.750 m in length, is attached to a hook in the ceiling. A 0.600 kg mass is rotating around the vertical axis and the angle between the vertical axis and the string is 18°. Tasks: a) Draw the free body diagram and kinetic diagram of the mass. b) Determine the tension in the string. c) Determine the velocity of the mass. --- **Explanation**: - **Free Body Diagram**: The diagram should show the mass suspended by the string at an angle of 18° from the vertical. Forces acting on the mass include the tension in the string (T) directed along the string and the gravitational force (mg) acting downward. - **Kinetic Diagram**: This diagram should depict the rotational motion of the mass with centripetal force directed towards the axis of rotation. - **Formulas**: - Use trigonometry to resolve the forces and determine the tension. - Use the centripetal force equation to calculate the velocity of the mass. **Mathematical Concepts**: - Trigonometric relations such as sine and cosine for angles in resolving forces. - Centripetal force equation: \( F_c = \frac{mv^2}{r} \), where m is mass, v is velocity, and r is the radius of the circular path. In determining the calculations, consider how these concepts apply to the described system.
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