physics-tutor

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Physics subject expertise for study notes, problem-solving, and explanations. Covers mechanics, electromagnetism, thermodynamics, waves, and modern physics. Provides diagrams, formulas, and step-by-step problem solutions. Use when studying physics topics, creating physics notes, solving physics problems, or explaining physical concepts. Triggers - physics help, mechanics, kinematics, forces, energy, electricity, magnetism, thermodynamics, waves.

General

What this skill does


# Physics Subject Expert

Specialized knowledge for physics studying, problem-solving, and note creation.

## Topic Coverage

```mermaid
mindmap
  root((Physics))
    Mechanics
      Kinematics
      Forces & Newton's Laws
      Energy & Work
      Momentum
      Rotational Motion
    Electromagnetism
      Electric Fields
      Circuits
      Magnetism
      EM Waves
    Thermodynamics
      Heat & Temperature
      Laws of Thermo
      Entropy
    Waves & Optics
      Wave Properties
      Sound
      Light & Optics
    Modern Physics
      Relativity
      Quantum Mechanics
      Nuclear Physics
```

---

## Quick Reference Links

- **Formulas and Constants:** See [formulas.md](references/formulas.md)
- **Mechanics Problems:** See [mechanics.md](references/mechanics.md)
- **Electromagnetism:** See [electromagnetism.md](references/electromagnetism.md)

---

## Diagram Patterns

### Free Body Diagram (ASCII)

```
                 N (Normal)
                 ↑
                 │
    f ←─────────┼─────────→ F (Applied)
    (friction)  │      
                │
                ↓
                W (Weight = mg)
```

### Vector Addition

```mermaid
flowchart LR
    A[Vector A] --> C[Resultant R]
    B[Vector B] --> C
```

### Circuit Diagram (ASCII)

```
    ┌────/\/\/\/────┐
    │      R        │
  ──┴──           ──┴──
  + │ -  Battery   │
  ──┬──           ──┬──
    │               │
    └───────────────┘
```

---

## Problem-Solving Framework

### General Steps

1. **Draw a diagram** - Visualize the situation
2. **List knowns and unknowns** - Organize given data
3. **Choose equations** - Match variables to formulas
4. **Solve algebraically first** - Keep symbols until the end
5. **Substitute values** - Include units
6. **Check answer** - Units, magnitude, direction

### Kinematics Problem Pattern

```
Given: v₀, a, t (or any 3 of 5 variables)
Find: x, v (or remaining variables)

Equations to choose from:
1. v = v₀ + at
2. x = v₀t + ½at²
3. v² = v₀² + 2ax
4. x = ½(v₀ + v)t
```

### Force Problem Pattern

```
1. Draw free body diagram
2. Choose coordinate system
3. Apply ΣF = ma in each direction
4. Solve system of equations
```

---

## Key Concepts Summary

### Newton's Laws

| Law | Statement | Equation |
|-----|-----------|----------|
| 1st | Object at rest stays at rest | If ΣF = 0, v = constant |
| 2nd | F = ma | ΣF = ma |
| 3rd | Action = Reaction | F₁₂ = -F₂₁ |

### Energy Conservation

$$E_{total} = KE + PE = \text{constant (in isolated system)}$$

$$KE = \frac{1}{2}mv^2 \quad PE_{gravity} = mgh \quad PE_{spring} = \frac{1}{2}kx^2$$

### Momentum Conservation

$$p = mv \quad \Sigma p_{before} = \Sigma p_{after}$$

---

## Common Mistakes to Avoid

1. **Forgetting to convert units** (km to m, hours to seconds)
2. **Wrong sign convention** (acceleration vs. deceleration)
3. **Using wrong kinematic equation** (check which variable is missing)
4. **Ignoring friction when it's present**
5. **Confusing instantaneous vs. average values**

Files: 4

Size: 10.9 KB

Complexity: 29/100

Category: General

Source: https://github.com/szeyu/vibe-study-skills/tree/main/skills/physics-tutor

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