Two Unequal Masses Hang from Either End of a Massless $\Delta$

question 15

Multiple Choice

Two unequal masses hang from either end of a massless cord that passes over a frictionless pulley.Which of the following is true about the gravitational potential energy (U) and the kinetic energy of the system (K) after the masses are released from rest?

• A)\(\Delta\)U < 0 and \(\Delta\)K > 0
• B)\(\Delta\)U = 0 and \(\Delta\)K > 0
• C)\(\Delta\)U < 0 and \(\Delta\)K = 0
• D)\(\Delta\)U = 0 and \(\Delta\)K = 0
• E)\(\Delta\)U > 0 and \(\Delta\)K < 0

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Definitions:

Accounting Profit

The total revenue of a business minus the explicit costs, representing the financial gain shown in the income statement.

Implicit Costs

The opportunity costs that arise from using assets, resources, or funds to undertake an action instead of another activity, not directly recorded in financial statements.

Explicit Costs

Direct monetary expenses incurred in the course of doing business, such as wages, rent, and materials.

Peak Efficiency

The optimal point at which a particular process or system operates with maximum effectiveness or efficiency.