A uniformly-dense equilateral triangle with weights hanging from each vertex is fixed at its center of mass as shown below: The triangle has a mass of 2kg and each side has a length of 0.50 meters, and it is held so that the vertex connected to F, is at an angle of 45° from the horizontal. All weights hang vertically downwards, where F=25 N, F2=15 N and F3=10 N. What is the magnitude of the angular acceleration when the triangle is released and allowed to rotate, in rad/s?? Justify your answer with your rationale and equations used. Itriangle = MI? T%3= Hint: Be careful with the angles you use for your calculation! Remember what the angle between vertexes of an equilateral triangle are.

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Chapter1: Units, Trigonometry. And Vectors
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### Educational Content: Angular Acceleration in an Equilateral Triangle

#### Diagram Description:
The image depicts a uniformly dense equilateral triangle with each side labeled as \( L \). Weights are attached at each vertex: \( F_1 = 25 \, \text{N} \), \( F_2 = 15 \, \text{N} \), and \( F_3 = 10 \, \text{N} \), hanging vertically downwards. The center of mass is marked, and dotted lines represent the radii \( r \) from the center of mass to the vertices. An angle \( \phi \) of \( 45^\circ \) is shown from the horizontal to vertex connected to \( F_1 \).

#### Problem Statement:
The triangle has a mass of 2 kg and each side measures 0.50 meters. When the triangle is rotated about its center of mass and released, determine the magnitude of the angular acceleration allowed, expressed in \( \text{rad/s}^2 \).

The formula for the moment of inertia \( I \) of the triangle is:
\[
I_{\text{triangle}} = \frac{1}{12} ML^2
\]

The equation for torque is:
\[
\tau = \frac{L}{\sqrt{3}}
\]

#### Solution Steps:
1. **Calculate the Moment of Inertia**:
   \[
   I_{\text{triangle}} = \frac{1}{12} \times 2 \times (0.50)^2
   \]
2. **Analyze and apply the torque equation** based on the forces and geometry of the triangle.
3. **Substitute appropriate values** for the calculation of angular acceleration.

### Important Note:
- Ensure correct usage of angles for calculations.
- Understand the geometric properties of equilateral triangles, especially the angles between vertices.

This exercise provides insights into rotational dynamics using an equilateral triangle, emphasizing concepts such as moment of inertia and torque in physics.
Transcribed Image Text:### Educational Content: Angular Acceleration in an Equilateral Triangle #### Diagram Description: The image depicts a uniformly dense equilateral triangle with each side labeled as \( L \). Weights are attached at each vertex: \( F_1 = 25 \, \text{N} \), \( F_2 = 15 \, \text{N} \), and \( F_3 = 10 \, \text{N} \), hanging vertically downwards. The center of mass is marked, and dotted lines represent the radii \( r \) from the center of mass to the vertices. An angle \( \phi \) of \( 45^\circ \) is shown from the horizontal to vertex connected to \( F_1 \). #### Problem Statement: The triangle has a mass of 2 kg and each side measures 0.50 meters. When the triangle is rotated about its center of mass and released, determine the magnitude of the angular acceleration allowed, expressed in \( \text{rad/s}^2 \). The formula for the moment of inertia \( I \) of the triangle is: \[ I_{\text{triangle}} = \frac{1}{12} ML^2 \] The equation for torque is: \[ \tau = \frac{L}{\sqrt{3}} \] #### Solution Steps: 1. **Calculate the Moment of Inertia**: \[ I_{\text{triangle}} = \frac{1}{12} \times 2 \times (0.50)^2 \] 2. **Analyze and apply the torque equation** based on the forces and geometry of the triangle. 3. **Substitute appropriate values** for the calculation of angular acceleration. ### Important Note: - Ensure correct usage of angles for calculations. - Understand the geometric properties of equilateral triangles, especially the angles between vertices. This exercise provides insights into rotational dynamics using an equilateral triangle, emphasizing concepts such as moment of inertia and torque in physics.
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