A Stone Is Tied to a String and Whirled at Constant

question 49

Multiple Choice

A stone is tied to a string and whirled at constant speed in a horizontal circle.The speed is then doubled without changing the length of the string.Afterward the magnitude of the acceleration of the stone is:

• A)the same
• B)twice as great
• C)four times as great
• D)half as great
• E)one-fourth as great

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Definitions:

Earth's Water

The total amount of water found on, under, and above the surface of the Earth, including oceans, ice caps, groundwater, lakes, and atmospheric water vapor.

Fresh Water

Water that has low concentrations of dissolved salts and other total dissolved solids, typically found in lakes, rivers, and groundwater.

Freshwater Lake

A body of water that has low concentrations of salts, typically found inland and not connected to the ocean.

Agriculture

The practice of cultivating soil, growing crops, and raising livestock for food, fiber, and other products.