00:01
All right, so we have two masses.
00:03
This is mass two that are connected by a string that runs over a massive pulley.
00:08
And we're told the mass of block two is 12 kilograms.
00:15
The pulley's mass is, i think, 14 kilograms.
00:21
You rewrite that symbol.
00:23
And then the hanging masses value is 7 .5 kilograms.
00:29
And the surface is frictionless that they lie on.
00:32
And we want to find the magnitude of the acceleration of the system.
00:36
So let's draw a free body diagram of block 2 for the moment.
00:40
Since there's no friction, the only force that's relevant is the tension, sorry, on the side of block 2, running into the pulley.
00:47
And then if we look at the pulley, we're going to have the tension on side 2, the tension on side 1...