Slanted Surfaces with Friction: the Figure Shows Two Packages That

question 47

Multiple Choice

Slanted surfaces with friction: The figure shows two packages that start sliding down a 20° ramp from rest a distance along the ramp from the bottom. Package A has a mass of 5.0 kg and a coefficient of kinetic friction 0.20 between it and the ramp. Package B has a mass of 10 kg and a coefficient of kinetic friction 0.15 between it and the ramp. How long does it take package A to reach the bottom?

• A) 2.7 s
• B) 3.0 s
• C) 3.2 s
• D) 3.5 s

---

Definitions:

Incentives

Rewards or benefits offered to motivate individuals or groups to behave in a certain way or to achieve specific objectives.

The World Is Flat

A metaphor that describes the increase in global interconnectedness, suggesting that geographical and geopolitical barriers are less relevant in the modern world.

Thomas Friedman

An American journalist and author known for his analysis on global affairs, particularly globalization and the technological world.

Internet

A global network of computers that provides vast information resources and communication facilities.