00:01
Ok, so in this particular example, we have a car on a banked curve.
00:04
And according to the free body diagram, there's no friction in this example.
00:09
We just have the bank of the car that is keeping it moving in the circular direction around the curve.
00:18
So what we're looking at here, and the reason why we didn't draw a centrifugal force or a centripetal force, we've got these four statements.
00:29
Now, the first statement is true.
00:32
So letter a, the centripetal force, is not a force in and of itself.
00:37
It's actually the parallel part of the normal force that is going to be acting as the centripetal force in this particular problem.
00:47
Now, part b, or statement b, is not true, because in order to travel in a circle, in order to be moving in a circle, there must be some force acting towards the center.
01:00
To keep you on that path.
01:02
So letter b is false.
01:04
That's not a true statement.
01:05
Likewise, with letter c, the centripetal force is the same as the normal force...