Two blocks rest on a horizontal frictionless surface as shown. The surface between the top and bottom blocks is roughened so that there is no slipping between the two blocks. A 30-N force is applied to the bottom block as suggested in the figure. 
-What is the acceleration of the "two block" system?
Definitions:
Future Earnings
The projected income a person or company is expected to generate in the future.
Public Saving
The portion of the government's revenue that remains after accounting for government spending.
Private Saving
The portion of households' income that is not spent on consumption but saved for future use.
Loanable Funds
The sum of money available for borrowing, influenced by savings and investments, within an economy at any given time.
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