A 10-Kg Block on a Rough Horizontal Surface Is Attached

question 11

Multiple Choice

A 10-kg block on a rough horizontal surface is attached to a light spring (force constant = 1.4 kN/m) . The block is pulled 8.0 cm to the right from its equilibrium position and released from rest. The frictional force between the block and surface has a magnitude of 30 N. What is the kinetic energy of the block as it passes through its equilibrium position?

• A) 4.5 J
• B) 2.1 J
• C) 6.9 J
• D) 6.6 J
• E) 4.9 J

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Definitions:

Long Run

A period of time in economics during which all factors of production and costs are variable, allowing for all possible adjustments, including changes in industry size.

Natural Monopoly

A market structure where a single firm can produce the entire market supply of a particular good or service at a lower cost than any potential competitor.

Network Effects

Network effects occur when the value of a product or service increases as more people use it, making it more attractive and beneficial to users.

Simultaneous Consumption

The same-time derivation of utility from some product by a large number of consumers.