A Stone Is Thrown with an Initial Speed of 15 $\degree$

question 49

Multiple Choice

A stone is thrown with an initial speed of 15 m/s at an angle of 53 $\degree$ above the horizontal from the top of a 40-m building. If g = 9.8 m/s² and air resistance is negligible, then what is the magnitude of the horizontal component of velocity as the rock strikes the ground?

• A) 7.5 m/s
• B) 9.0 m/s
• C) 12 m/s
• D) 29 m/s

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Definitions:

Quantity Change

A variation in the amount of goods or services produced or supplied, often measured to assess economic shifts or business performance.

Industry

A sector of the economy that involves the production and manufacturing of goods or the provision of services.

Long Run

A period during which all factors of production and costs are variable, in contrast with the short run where some costs are fixed.

Short Run

A period in economics during which at least one input, such as plant and equipment, is fixed, focusing on immediate effects of economic decisions.