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I can see that you've uploaded a physics multiple-choice question sheet in Arabic, involving mechanics and forces. Let's break down the problems one by one and solve them:

1. **Momentum Question**  
   The first problem asks which unit is appropriate for momentum \(\vec{p} = m \cdot v\). Momentum is measured in **kg·m/s**.  
   The correct answer is: **B. kg·m/s**.

2. **Newton’s Second Law from the Graph**  
   According to Newton's second law \(F_{\text{net}} = ma\), the graph depicts a straight line. The slope of the force vs. mass graph should represent **acceleration** (since \(F = ma\)).  
   The correct answer is: **D. التسارع (acceleration)**.

3. **Work Done**  
   Given the formula for work \(W = F \cdot d \cdot \cos(\theta)\), the work can be positive, zero, or negative depending on the angle \(\theta\). For the scenario where work is **positive** or **negative**, it depends on the angle.  
   The correct answer is: **C. موجب (positive)**.

4. **Kinetic Friction on Different Surfaces**  
   The graph shows the relationship between the kinetic friction force and the normal force for different surfaces. The surface with the smallest slope (graph \(c\)) has the lowest coefficient of kinetic friction.  
   The correct answer is: **C. c**.

5. **Angle Equal to \(2\pi\)**  
   \(2\pi\) radians is equivalent to **360 degrees**. The angle in the options that matches \(2\pi\) radians is **360 degrees**.  
   The correct answer is: **D. 360°**.

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Let me know if you need any clarifications or further details on the problems.

Here are some related questions to deepen your understanding:

1. How does the angle \(\theta\) in the work equation affect the sign of the work?
2. What does the area under the force vs. displacement graph represent?
3. How does the coefficient of friction affect the motion of an object?
4. Can momentum be negative? Why or why not?
5. How does the net force on an object affect its acceleration?

**Tip:** Always consider the direction of forces and angles when applying the work-energy principle.

Physics multiple-choice problems in Arabic focusing on mechanics, forces, and motion.

Learn how to solve high school physics problems involving momentum, Newton's second law, work-energy principle, and friction with step-by-step solutions. Ideal for high school students preparing for exams.

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