The Figure Shows Two Packages That Start Sliding Down a 20°

question 14

Multiple Choice

The figure shows two packages that start sliding down a 20° ramp from rest a distance d = 6.6 m 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

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Definitions:

Law of Effect

A psychological principle suggesting that behaviors followed by satisfactory outcomes are more likely to be repeated, whereas those followed by unsatisfactory outcomes are less likely to be repeated.

Satisfying Outcomes

Outcomes that fulfill or exceed the expectations of an individual, leading to contentment or happiness.

Behaviors

The observable actions, reactions, or conduct of an individual or group in response to external or internal stimuli.

Frustrating Outcomes

Results of actions that cause annoyance or disappointment due to failure to satisfy needs or expectations.