00:01
We'd like to find the speed of each block.
00:04
So our total energy is our sum of our potential and our gravitational potential energy.
00:09
So let's find our total energy.
00:12
That's going to be one -half kx squared plus mass 2, gravity times height.
00:17
So we can plug in 1 -half times 240 times 0 .16 squared, plus 40 times 9 .8 times our 0 .16 meters.
00:29
So let's plug this into a calculator to find our total energy.
00:33
We have one -half times 240 times .16 squared, plus 40 times 9 .8 times .16 gives us 65 .7 joules as our total energy.
00:47
Now we want to find our total kinetic energy.
00:51
Our kinetic energy is one -half mass 1v squared plus 1ā2v squared.
00:58
So this will be one half times the sum of our masses, which is 16 plus 40, so that's 56 v squared, or 28 v squared...