A Solid Wood Door, 90

question 27

Multiple Choice

A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is ajar and at rest. A ball with a mass of 500 g is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the same line. How much energy is lost in the process?

• A) 29.8 J
• B) 16.3 J
• C) 14.9 J
• D) 12.7 J
• E) 4.79 J

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Definitions:

Transformation

The process of changing or converting one form or state of something into another, often seen in manufacturing and industry.

Opportunity Cost

The cost of forgoing the next best alternative when making a decision or choosing to consume or produce one good or service over another.

Ppf

The Production Possibility Frontier, a curve depicting the maximum output possibilities for two goods, given available resources and technology.

Efficiently

The method of performing or functioning in the best possible manner with the least waste of time and effort.