Consider the 61.0 kg mountain climber in the figure. 31° Flegs 15° (a) Find the tension in the rope (in N) and the force (in N) that the mountain climber must exert with her feet on the vertical rock face to remain stationary. Assume that the force is exerted parallel to her legs. Also, assume negligible force exerted by her arms. tension in rope force on feet (b) What is the minimum coefficient of friction between her shoes and the cliff?

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**Mountain Climber Tension and Friction Analysis**

**Scenario:**

Consider a 61.0 kg mountain climber in the figure below:

- The climber is positioned on a vertical rock face, supported by a rope.
- The rope is angled at 31° above the horizontal.
- The climber's legs exert force at an angle of 15° below the horizontal.

**Diagram Explanation:**

The diagram shows a climber sitting against a vertical cliff using a rope. The forces acting on the climber include:

- \( \vec{F}_{\text{legs}} \), the force exerted by the climber's legs parallel to her body.
- \( \vec{T} \), the tension in the rope pulling upward at an angle.
- The angle between the rope and the horizontal is 31°.
- The angle between the climber’s legs and the horizontal is 15°.

**Questions:**

**(a)** Determine the following:

1. **Tension in the Rope:** 
   - Calculate the force (in Newtons) that the rope must exert to keep the climber stationary.

2. **Force on the Feet:** 
   - Calculate the force (in Newtons) that the climber must exert with her feet on the rock face.

Assumptions:
- Forces by the arms are negligible.
- Legs exert force parallel to the climber's body.

- **Tension in Rope:** \(\_\_\_\_\_\_\_\_\) N
- **Force on Feet:** \(\_\_\_\_\_\_\_\_\) N

**(b)** Calculate:

- **Minimum Coefficient of Friction:**
  - Determine the minimum coefficient of friction between the climber’s shoes and the rock to prevent slipping.

- \(\_\_\_\_\_\_\_\_\_\)

The above setup and calculations involve applying principles of static equilibrium, trigonometry, and friction to solve for the necessary forces and coefficients.
Transcribed Image Text:**Mountain Climber Tension and Friction Analysis** **Scenario:** Consider a 61.0 kg mountain climber in the figure below: - The climber is positioned on a vertical rock face, supported by a rope. - The rope is angled at 31° above the horizontal. - The climber's legs exert force at an angle of 15° below the horizontal. **Diagram Explanation:** The diagram shows a climber sitting against a vertical cliff using a rope. The forces acting on the climber include: - \( \vec{F}_{\text{legs}} \), the force exerted by the climber's legs parallel to her body. - \( \vec{T} \), the tension in the rope pulling upward at an angle. - The angle between the rope and the horizontal is 31°. - The angle between the climber’s legs and the horizontal is 15°. **Questions:** **(a)** Determine the following: 1. **Tension in the Rope:** - Calculate the force (in Newtons) that the rope must exert to keep the climber stationary. 2. **Force on the Feet:** - Calculate the force (in Newtons) that the climber must exert with her feet on the rock face. Assumptions: - Forces by the arms are negligible. - Legs exert force parallel to the climber's body. - **Tension in Rope:** \(\_\_\_\_\_\_\_\_\) N - **Force on Feet:** \(\_\_\_\_\_\_\_\_\) N **(b)** Calculate: - **Minimum Coefficient of Friction:** - Determine the minimum coefficient of friction between the climber’s shoes and the rock to prevent slipping. - \(\_\_\_\_\_\_\_\_\_\) The above setup and calculations involve applying principles of static equilibrium, trigonometry, and friction to solve for the necessary forces and coefficients.
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