In the Figure, a Ball Hangs by a Very Light

question 142

Multiple Choice

In the figure, a ball hangs by a very light string. What is the minimum speed of the ball at the bottom of its swing (point B) in order for it to reach point A, which is 1.0 m above the bottom of the swing?

• A) 4.4 m/s
• B) 3.1 m/s
• C) 2.2 m/s
• D) 4.9 m/s

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Definitions:

Competitive Firm

A firm operating in a market where it has no power to influence market prices and typically faces many competitors with similar products.

Normal Profits

The minimum level of profit needed for a company to remain competitive in the market; it occurs when economic profit is zero after accounting for all costs, including opportunity costs.

Purely Competitive

A market structure characterized by a large number of small firms, identical products, and free entry and exit from the market, leading to price-taking behavior.

Long Run

A period in which all factors of production and costs are variable, allowing complete adjustment to changes.