A Block of Wood Is Pulled by a Horizontal String

question 14

Multiple Choice

A block of wood is pulled by a horizontal string across a rough surface at a constant velocity with a force of 20 N.The coefficient of kinetic friction between the surfaces is 0.3.The force of friction is

• A)impossible to determine without knowing the mass of the block.
• B)impossible to determine without knowing the speed of the block.
• C)0.3 N
• D)6 N
• E)20 N

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Definitions:

Supply Curve

A visual depiction that illustrates the connection between the cost of a product and the amount available.

MC Curve

The Marginal Cost Curve, depicting the increase in total cost that arises from producing one additional unit of a good or service.

Cost Curves

Graphs that show the cost of producing different quantities of a good or service, typically including average and marginal cost curves.

Market Price

The current price at which an asset or service can be bought or sold in a competitive marketplace.