A 640-N Acrobat Falls 5

question 89

Multiple Choice

A 640-N acrobat falls 5.0 m from rest into a net.The net tosses him back up with the same speed he had just before he hit the net.The average upward force exerted on him by the net during this collision is:

• A)32 N
• B)64 N
• C)320 N
• D)640 N
• E)impossible to determine from given data

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Definitions:

Efficient Scale

The level of production at which average total costs are minimized, indicating the most cost-effective scale of operation.

Marginal Cost

The expenditure required to produce one more unit of a particular product or service.

Monopolistically Competitive

A market structure characterized by many firms, differentiated products, and free entry and exit, allowing firms some control over price while still competing on quality, branding, and price.

Externality

A cost or benefit that affects a third party who did not choose to incur that cost or benefit.