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The image describes a physical scenario where a mass \( m \) is attached to the end of a massless pole and connected to a platform with mass \( M \). The setup involves a frictionless table, and the question asks for the minimum static friction coefficient \( \mu \) between the platform and the table so that the platform remains stationary while the mass \( m \) rotates around the pole.

### Key elements to extract:
1. **System setup**: 
   - A mass \( m \) is attached to a massless pole of length \( l \) and is released from rest.
   - The platform has mass \( M \), and the goal is to prevent it from moving.
   - The mass \( m \) rotates around the pole in a circular motion.

2. **Centripetal force**: 
   - When the mass \( m \) moves in a circular path, the tension in the rope provides the centripetal force.
   - The formula for centripetal force is \( F_{\text{centripetal}} = \frac{m v^2}{l} \), where \( v \) is the tangential velocity of the mass \( m \), and \( l \) is the length of the rope.

3. **Friction force on platform**: 
   - To prevent the platform from moving, the friction force between the platform (mass \( M \)) and the table must balance the horizontal force exerted by the tension in the rope.
   - The friction force \( F_{\text{friction}} = \mu M g \), where \( \mu \) is the static friction coefficient, and \( g \) is gravitational acceleration.

4. **Force equilibrium**:
   - The tension in the rope causes a force on the platform, which is opposed by friction. Hence, \( T = F_{\text{friction}} \).

### Solution Approach:
- The tension in the rope can be expressed as \( T = \frac{m v^2}{l} \).
- The platform remains stationary if the friction force equals this tension: \( \mu M g = T \).
- Substituting \( T \): 
  \[
  \mu M g = \frac{m v^2}{l}
  \]
- Rearranging for \( \mu \): 
  \[
  \mu = \frac{m v^2}{M g l}
  \]

However, since no specific velocity is given, the expression in this form represents the minimum static friction coefficient \( \mu \) that depends on how fast the mass \( m \) is rotating.

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Would you like to dive into more details on how we can compute the velocity \( v \), or do you have any other specific questions about this setup? 

Here are five follow-up questions to expand on this concept:
1. How would the coefficient of friction change if the mass \( M \) of the platform increases?
2. What role does the length of the rope \( l \) play in determining the tension?
3. Can the mass \( m \) ever move fast enough that the platform moves, even with high friction?
4. What assumptions are we making about the rotational motion of the mass \( m \)?
5. How can the velocity \( v \) of the mass be calculated in this scenario?

### Tip:
Always analyze the forces acting on each component of the system independently and identify which force provides the centripetal acceleration for circular motion.

Dudukan terdiri dari alas bermassa M yang dihubungkan ke tiang tak bermassa. Massa m dipasang ke ujung tiang melalui tali panjang tak bermassa l dan pada awalnya tidak bergerak pada tingkat horizontal yang sama dengan ujung kutub. Massa m kemudian dilepaskan. Tentukan koefisien minimum gesekan statis μ antara dudukan dan meja jika dudukan tidak terjemahkan sementara massa m mengalami gerakan melingkar di sekitar ujung tiang.

This problem calculates the minimum static friction coefficient μ required between a platform of mass M and a table so that the platform remains stationary while a mass m rotates around a massless pole. Explore key physics concepts such as centripetal force, tension, and force equilibrium in this advanced high school-level physics problem.

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