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In the problem you provided, an airplane releases a bundle of food supplies while flying horizontally at a constant speed of 350 km/h. You are asked to determine various components of the bundle's velocity as it falls to the ground. Let's go over the answers given and the question you're having trouble with.

1. **Vertical Component of Velocity:**
   - Initial vertical component of velocity = **0 km/h** (This is correct because the bundle is initially moving horizontally with the plane, so it has no vertical velocity at the moment of release).

2. **Horizontal Component of Velocity:**
   - Initial horizontal component of velocity = **350 km/h** (This is also correct since the bundle is moving at the same speed as the plane in the horizontal direction when released).

3. **Horizontal Component of Velocity Just Before Hitting the Ground:**
   - This is where you seem to have the incorrect answer. 

The key to understanding this problem is that **horizontal velocity** is not affected by gravity if air resistance is ignored, which is the assumption here. Gravity only affects the vertical motion. Thus, the horizontal velocity remains **350 km/h** until the moment the bundle hits the ground.

### Final Answer:
- **Horizontal component of velocity just before hitting the ground = 350 km/h**

Would you like more detailed information on the motion of the bundle? 

Here are five related questions you might find useful:

1. How does air resistance affect the horizontal velocity in real-world scenarios?
2. What is the vertical component of velocity just before the bundle hits the ground?
3. How do we calculate the time it takes for the bundle to hit the ground based on the plane's altitude?
4. What are the equations of motion for vertical and horizontal components separately in projectile motion?
5. How does the trajectory of the bundle appear from the point of view of someone on the ground?

**Tip**: In projectile motion, horizontal and vertical components of motion are treated independently unless external forces (like air resistance) come into play.

An airplane flying horizontally at a constant speed of 350 km/h over level ground releases a bundle of food supplies. Ignore the effect of the air on the bundle. What is the bundle's initial vertical component of velocity? What is the bundle's initial horizontal component of velocity? What is its horizontal component of velocity just before hitting the ground?

Learn how to calculate the initial vertical and horizontal velocity components of a bundle released from a plane flying horizontally at 350 km/h. Understand the concept of projectile motion, including the impact of gravity and the constant horizontal velocity assumption when air resistance is ignored. Suitable for high school physics students.

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