00:01
All right, so we're going to answer a few conceptual questions about free fall, right? so what is free fall? free fall is when an object is dropped or let go, and the only force it experience is the force due to gravity.
00:17
And so, you know, you can have free fall problems on earth, you've given them on like mars or whatever, but typically you'll see a free fall problem on earth.
00:25
And as it turns out, right, in a free fall problem, you have two objects, and the only four.
00:31
Acting on those two objects is gravity.
00:34
They're going to hit the ground at the same time.
00:35
They're going to accelerate at the same rate.
00:39
And to answer the second question, what is the initial velocity during free fall? well, you're just letting go of something, right? so at the initial time, let's say t equals zero, if you want to call it that, when you let's something go, it's zero.
00:53
There is no initial velocity.
00:55
If you have some velocity and you have some angle, like let's say you throw a football or you, you know, at some angle, that's what, one what's called a projectile motion problem...