A Brass Ball Is Shot Vertically Upward from the Surface

question 57

Multiple Choice

A brass ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. One second later, the ball has an instantaneous velocity in the upward direction of 15.0 m/s.
-How long is the ball in the air when it returns to its original position?

• A)4.0 s
• B)4.6 s
• C)8.0 s
• D)9.2 s
• E)16 s

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Definitions:

First-Move Ability

The strategic advantage gained by being the initial entrant into a new market or business segment.

Marginal Revenue

The additional income gained from selling one more unit of a good or service.

Cournot Duopoly

A model of competition between two firms, in which each firm decides the quantity to produce independently and simultaneously with the goal of maximizing profit.

Perfectly Competitive

A market structure characterized by a large number of small firms, all selling identical products, where no single firm can influence the market price.