0:00
Hello.
00:02
So we're going to assume that at this point, right, a is where you begin to slam the brakes.
00:09
So you're going to go through some distance, we don't know, some distance x, right? let's say you stop here.
00:24
So indeed we can use energy conservation to do this so we can say that the work done.
00:30
So the frictional force is in the opposite direction, right? so we can say work done.
00:36
Or it's a work by friction.
00:42
Equal to the change in potential energy plus the change in kinetic energy.
00:58
So if we ask to find how fast we find in the distance.
01:01
So the frictional force, f or f sum r, then that distance is the x, simple to the.
01:08
So the potential energy is basically the work done by the weight down the plane.
01:14
So here we have m .g.
01:16
Side theta, okay.
01:19
So we have ng, slight theta.
01:24
It's also going to go through the same distance, right? so times x...