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The problem you have shared describes two scenarios (Crash 1 and Crash 2) involving air hockey paddles with different masses, both colliding with a puck. Here's an analysis:

### **Crash 1:**
- **Before:**
  - Red Paddle (less mass) is moving at 2 m/s.
- **After:**
  - Red Paddle is moving at 4 m/s (it sped up by 2 m/s).

### **Crash 2:**
- **Before:**
  - Purple Paddle (more mass) is moving at 2 m/s.
- **After:**
  - Purple Paddle is moving at 4 m/s (it also sped up by 2 m/s).

### Question: In which crash did the puck experience a stronger force? Why?

### Key Concepts:
- **Newton's Third Law:** For every action, there is an equal and opposite reaction. When the paddles hit the puck, the puck exerts a force on the paddles and vice versa.
- **Force Calculation (using Newton’s Second Law):** \( F = m \cdot a \)
  - **Acceleration** is related to the change in velocity.
  - **Mass:** A more massive object (like the purple paddle) will exert more force than a lighter object (like the red paddle) if the acceleration is the same.

### Comparing the Crashes:
- **Crash 1:** The red paddle has less mass but undergoes the same change in velocity (2 m/s).
- **Crash 2:** The purple paddle has more mass but undergoes the same change in velocity (2 m/s).

Since the purple paddle (Crash 2) has more mass and the same acceleration as the red paddle, the **force** exerted on the puck in Crash 2 would be **greater**.

### Answer:
The correct answer would be **(b)**: **Crash 2**, because the paddle has more mass, so the force on the puck was also stronger.

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Would you like more detailed steps or clarifications? Here are 5 follow-up questions to expand your understanding:

1. How would the result change if the paddles had the same mass but different accelerations?
2. How can Newton’s third law help you analyze interactions in collisions?
3. What would happen to the force if both paddles had less mass but the same speed change?
4. How is momentum conserved in these types of collisions?
5. Can you calculate the exact force on the puck using the mass and velocity change?

**Tip:** Remember that force depends on both mass and acceleration. Even if the speed change is the same, the heavier object always exerts more force.

In which crash did the puck experience a stronger force? Why?

Analyze the forces involved in air hockey paddle collisions where the masses differ but velocity changes are the same. Learn how Newton's Second Law applies to determine which paddle exerts a stronger force on the puck.

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