
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Transcribed Image Text:**Educational Exercise: Circular Motion and Tension Calculation**
In the image, a bead is attached to the end of a string and moves in a horizontal circle with a constant speed of 1.43 m/s. Key parameters are provided: the string's length \( L \) is 185 cm, and the bead's mass is 27.0 g. The angle \( \theta \) from the vertical is 19.0°. Air resistance is negligible.
### Objective
Use two different approaches to calculate the tension \( T \) in the string.
### Graphical Explanation
The image depicts a bead attached to a string, which is fixed at one end. The bead moves in a horizontal circle, indicating a conical pendulum. The diagram includes:
- A vertical line from the fixed point to the bead, labeled \( L \) (the string length).
- An angle \( \theta = 19.0^\circ \) shown between the vertical component of the string and the string itself.
- A circle indicating the path of the bead’s horizontal motion.
### Problem-Solving Steps
**(a)** Apply the GFS method to explain each step in solving the problem.
**(b)** Create a Free Body Diagram (FBD) for the bead:
- Identify and label all external forces acting on it.
- Represent each force with an arrow.
- Specify the x and y coordinate systems to be used for calculations.
**(c)** Write Newton’s Second Law for the x direction:
- Simplify using given information.
- Solve for tension \( T \), providing answers to two significant figures.
**(d)** Write Newton’s Second Law for the y direction:
- Simplify using given information.
- Solve for tension \( T \) to two significant figures.
### Answer Choices
Choose the correct tension \( T \) from the following options, ensuring consistency between both methods:
- 0.28 N
- 0.23 N
- 0.18 N
- 0.31 N
- 0.10 N
### Note
We'll collaborate in class to sketch the FBD and apply Newton’s Laws for accurate tension calculations. Be cautious with units and rounding, as precision is crucial for correct results.
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