For This Question, Assume That All Velocities Are Horizontal and That

question 68

Multiple Choice

For this question, assume that all velocities are horizontal and that there is no friction. Two skaters A and B are on an ice surface. A and B have the same mass M = 90.5 kg. Skater A is initially motionless, and then throws a ball with mass m = 200 g toward B with a speed v = 21.5 m/s relative to the ice. B catches the ball and throws it back to A with the same speed. After A catches the ball, his speed with respect to the ice is

• A) 4.3  10³ m/s.
• B) 4.3 m/s.
• C) 4.8  10^-2 m/s.
• D) 9.5  10^-2 m/s.
• E) 0.34 m/s.

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Definitions:

Economic Efficiency

A state in which resources are optimally allocated to serve each person in the best way while minimizing waste and inefficiency.

Entry Barriers

Obstacles that make it difficult for new competitors to enter a market, including high startup costs, stringent regulations, and established brand loyalty.

Brand Loyalty

A customer's consistent preference for one brand over all others, often reflected in repeated purchases.

Economies of Scale

The financial benefits that businesses gain from their operation size, where the cost for each unit produced typically diminishes as the scale of operation grows.