Why do objects fall faster when dropped from greater heights?

MA mariana83 BR 🌱 Newbie 👁 44 ⚑ Report Physics

I was thinking about this yesterday when I dropped my phone from the third-floor window. People say that the higher you drop something from, the faster it falls, but does that actually make sense? Shouldn't gravity be the same?

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Actually, gravity is always the same, but the object has *more time* to accelerate when it falls from a greater height. Think of it this way: when you drop something, it starts slow and keeps gaining speed as it falls, so the higher up it is, the more time it has to keep accelerating and hit the ground much faster than if it had fallen from like 30 centimeters. The acceleration is constant (about 10 m/s² here on Earth), but the *final velocity* changes a lot depending on how much distance the object has to gain speed.

The object doesn't fall faster just because of the height - it's more subtle than that. Gravity pulls with the same force always, you're right about that, but the greater the distance, the more time the object has to gain speed. It's like when you drop something from 1 meter versus from 10 meters - in both cases the acceleration is identical, but in the second scenario it had way more time to move fast before hitting.

Let me give you a pretty specific example: when I drop tools in my yard from different heights, the one that falls from the tree (which is around 6-7 meters) hits with way more force than the one I drop from my hand. But if I timed both in the air, the difference is in the fall time, not in the acceleration itself. The first one takes more seconds to reach the ground, so it has more opportunity to gain speed during the fall.

So getting back to your phone (hope it survived) - it fell from the third floor because gravity is always the same, but it had like 2-3 seconds of falling while gaining speed the whole time. If it fell from a meter, it would hit with way less energy because the time was really short. It's more a matter of *how much time* to accelerate than the force of gravity changing.

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