00:03
Hello, so we have here an incline plane, an inclined plane, inclined at an angle of 60.
00:15
There's a mass on the plane, the mass is 2 kilograms, and so its weight is mass times gravity, 9 .8.
00:26
There's a component of the weight that acts along the plane.
00:29
The main component is m .g.
00:33
Sin teta.
00:36
That is the mass two.
00:38
I think it's just symbols for now to make it clearer.
00:42
So mass time gravity.
00:45
That is the weight of the object.
00:47
And the component here, the component of weight acting among the plane is ng of some theta.
00:55
The component that acts particular to the plane is mg cross theta.
01:06
The normal reaction are and the friction opposing the intended direction of motion.
01:21
Horizontal force is applied.
01:31
Air force also has parallel components given by f cross theta and a perpendicular component given by f sign theta now if the body is prevented from falling what that means is that there's equilibrium of course so for equilibrium along the plane along the plane the force is trying to fool the body down i think okay so along the plane for equilibrium for equilibrium along the plane the force is trying to bring the body down m g sign theta as equal to the forces pushing it up which is which are f cost theta plus mu r now if you look at the equilibrium cross the plane becomes up around that f sign theta plus m g cost theta so our r here u .r is going to be f sign theta plus mg cross theta.
03:44
Yeah, okay, so we make every subject.
04:02
So, um, we can like themes, we see that m .g.
04:08
Sine theta minus is equal to f cost theta plus u...