What is the upper block's acceleration if the coefficient of kinetic friction between the block and the table is 0.16?

(Missing figure is here: https://www.physicsforums.com/attachments/ch05-p070-jpg.149243/ )

Let's call  and  the masses of the two blocks. We can write Newton's second law for both blocks (sum of all forces acting on the block = ma). On block 1, we have two forces: the weight  pointing downwards and the tension of the string T poiting upwards. On block 2, we have the tension of the string going right and the friction  going left. Therefore




Summing the two equations, we find

and then using  we can find the acceleration:

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.