The two masses in the figure are released from rest. After the 3.0-kg mass has fallen 1.5 m, it is moving with a speed of 3.8 m/s. What is the change in mechanical energy done on the system during this time interval by the frictional force on the 2.0 kg mass? 
Definitions:
Gross Margin Percentage
A financial metric that measures a company's financial health by revealing the proportion of money left over from revenues after accounting for the cost of goods sold (COGS).
Return On Equity
A financial ratio indicating the profitability of a firm in relation to its shareholders' equity, measuring how much profit is generated from the equity.
Return On Equity
calculates the amount of net income returned as a percentage of shareholders equity, measuring a corporation's profitability by revealing how much profit a company generates with the money shareholders have invested.
Common Stock
A form of equity security signifying an ownership stake in a company, granting the holder the right to participate in voting on corporate issues and to earn dividends.
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