- #1
jumbogala
- 423
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Homework Statement
Okay, this isn't actually a problem that my teacher assigned, but just thinking about it is confusing me enough to make me confused about the whole course, haha.
Here it is: If you drop a penny one inch above your hand, it isn't going to hurt much. However, drop it 3000 feet above your hand and you'll be in a lot of pain. Why?
Homework Equations
Okay, I would assume it's because the penny hits your hand with a lot more force the second time, right? But... that can't be right if F=ma.
The penny's mass doesn't change depending on the height you drop it from, and neither does its acceleration. So the force must be equal both times, right?
The Attempt at a Solution
So it's not force that causes the penny to hit your hand harder the second time...? *confused*