At the Same Instant That a 0

question 61

Multiple Choice

At the same instant that a 0.50-kg ball is dropped from 25 m above Earth, a second ball, with a mass of 0.25 kg, is thrown straight upward from Earth's surface with an initial speed of 15 m/s.They move along nearby lines and pass without colliding.At the end of 2.0 s the velocity of the center of mass of the two-ball system is:

• A)11 m/s, down
• B)11 m/s, up
• C)15 m/s, down
• D)15 m/s, up
• E)20 m/s, down

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Definitions:

Returns to Scale

The rate at which output increases as inputs are increased proportionally, indicating how efficiently larger production scales affect production volume.

Diseconomies of Scale

The phenomenon where production costs per unit increase as a firm or operation grows in scale, opposite of economies of scale.

Returns to Scale

The change in output resulting from a proportionate increase in all inputs; the concept explains how output changes with varying levels of input.

Economies of Scale

Cost advantages that enterprises obtain due to their scale of operation, typically resulting in lower per-unit costs with increased production.