00:01
Okay, so we've got a series of questions about circular motion.
00:03
The first one is asking about the centripetal force, which is the net force.
00:09
The net force should be in which direction.
00:12
According to newton's second law, net force equals mass times acceleration, and these are vectors.
00:17
So the net force should be in the same direction as the acceleration or the centripetal acceleration.
00:27
A centripetal actually means center pointing.
00:30
So the acceleration is pointing toward the center and the net force is pointing toward the center.
00:35
Both of those are true in circular motion.
00:38
Okay, for number two, we're looking at what type of acceleration is occurring.
00:42
This is a little bit of an odd question because we usually don't categorize acceleration by types.
00:47
However, looking at the choices here, positive and negative would be definite noes.
00:53
Directional, there is a direction to it, but that's not really a type of acceleration.
00:57
I do think that constant makes sense just because if it's uniform circular motion, then you would have a constant acceleration.
01:06
Now, it doesn't specify that in the question, but that's what most of these questions seem to be about.
01:11
So i would go with that one.
01:13
I think that is what they're going for on number two.
01:18
Okay, number three we've actually already talked about, but let's review it again here.
01:23
Is there a net force acting on this object? so the answer would be yes, there must be a net force in order to have an acceleration...