A person of mass mp = 79 kg is standing on a rung, one third of the way the ladder of length d = 4.0 m. The mass of the ladder, mɩ = 15 kg, is uniformly distributed. The ladder is initially inclined at an angle 0 = 69° with respect to the horizontal. There is no friction between the ladder and the wall but there is friction between the base of the ladder and the floor. Determine the minimum coefficient of friction between the ladder and the floor so that the ladder does not slip. 69°

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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**Problem Statement:**

A person of mass \( m_p = 79 \, \text{kg} \) is standing on a rung, one third of the way up a ladder of length \( d = 4.0 \, \text{m} \). The mass of the ladder, \( m_l = 15 \, \text{kg} \), is uniformly distributed. The ladder is initially inclined at an angle \( \theta = 69^\circ \) with respect to the horizontal. There is no friction between the ladder and the wall, but there is friction between the base of the ladder and the floor. Determine the minimum coefficient of friction between the ladder and the floor so that the ladder does not slip.

**Diagram Description:**

- The diagram on the left shows a person climbing a ladder that leans against a wall. 
- The ladder forms a 69° angle with the ground.
- The person is positioned one third of the way from the bottom of the ladder.
- There is no indication of friction between the wall and the ladder, as stated, but friction does exist between the ladder's base and the floor.

To solve this problem, consider the forces acting on the ladder and apply static equilibrium conditions to calculate the minimum coefficient of friction needed to prevent slipping.
Transcribed Image Text:**Problem Statement:** A person of mass \( m_p = 79 \, \text{kg} \) is standing on a rung, one third of the way up a ladder of length \( d = 4.0 \, \text{m} \). The mass of the ladder, \( m_l = 15 \, \text{kg} \), is uniformly distributed. The ladder is initially inclined at an angle \( \theta = 69^\circ \) with respect to the horizontal. There is no friction between the ladder and the wall, but there is friction between the base of the ladder and the floor. Determine the minimum coefficient of friction between the ladder and the floor so that the ladder does not slip. **Diagram Description:** - The diagram on the left shows a person climbing a ladder that leans against a wall. - The ladder forms a 69° angle with the ground. - The person is positioned one third of the way from the bottom of the ladder. - There is no indication of friction between the wall and the ladder, as stated, but friction does exist between the ladder's base and the floor. To solve this problem, consider the forces acting on the ladder and apply static equilibrium conditions to calculate the minimum coefficient of friction needed to prevent slipping.
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