A 20-Kg Block on a Horizontal Surface Is Attached to a Light

question 56

Multiple Choice

A 20-kg block on a horizontal surface is attached to a light spring (force constant = 8.0 kN/m) . The block is pulled 10 cm to the right from its equilibrium position and released from rest. When the block has moved 2.0 cm toward its equilibrium position, its kinetic energy is 13 J. How much work is done by the frictional force on the block as it moves the 2.0 cm?

• A) −2.5 J
• B) −1.4 J
• C) −3.0 J
• D) −1.9 J
• E) −14 J

---

Definitions:

Debt

An amount of money borrowed by one party from another, under the condition that it is to be paid back at a later date, usually with interest.

Financial Risk

The possibility of losing money on an investment or business venture.

ROE

Return on Equity measures a corporation's profitability by revealing how much profit a company generates with the money shareholders have invested.

EPS

Earnings Per Share, a financial ratio that measures the portion of a company's profit allocated to each outstanding share of common stock.