00:01
According to newton's second law of motion, not force is equal to the product of the mass and acceleration.
00:06
In this problem, we have an assembly of two blocks, which mass is 2 and 3 kilograms, are being acted by forces as shown.
00:14
The coefficient of kinetic friction between each of the blocks and the surface is 0 .3.
00:20
And we want to find the magnitude of the force on 2 kilogram block by the 3 kilogram block.
00:25
So first is that let us find the acceleration of the blocks.
00:29
So since the forces are unbalanced in this case, certainly the blocks will accelerate.
00:37
So to get the net force, let's solve first for the, well, let's draw the free body diagram.
00:47
So aside from the applied forces, there is also friction force that tries to oppose the motion of the object.
00:57
So assume that the friction force is directed this way.
00:59
And so from the newton's or rather the net force for this will be taking the direction to the right as positive.
01:08
So we have 30 minus 10 minus the frictional force.
01:14
Now, frictional force is directly proportional to the normal force.
01:21
In this case, that the surface is level, the normal force is equal to the weight.
01:27
So there will be two frictional forces, one for the two kilogram block...