# What happens to the horizontal velocity of an object as it travels through the air?

**Question: What happens to the horizontal velocity of an object as it travels through the air?**

The horizontal velocity of an object in air remains constant as it travels, assuming there is no air resistance. This is because, in the absence of external forces, an object in motion will stay in motion at the same speed and in the same direction, according to Newton's first law of motion. In projectile motion, the only force acting on the object is gravity, which only affects the vertical component of the object's velocity. Therefore, the horizontal component of the velocity remains unchanged throughout the flight. However, in real-world conditions, air resistance can have an effect, potentially slowing down the object's horizontal velocity over time. For precise calculations, one would need to consider this resistance, but it is often negligible for simple physics problems and demonstrations.

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