A 10-Kg Ball on the End of a String Is Whirled

question 46

Multiple Choice

A 1.0-kg ball on the end of a string is whirled at a constant speed of 2.0 m/s in a horizontal circle of radius 1.5 m. What is the work done by the centripetal force during one revolution?

• A)zero joules
• B)2.7 J
• C)6.0 J
• D)25 J
• E)33 J

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Definitions:

Gram-variable

Bacteria that do not consistently stain as either Gram-positive or Gram-negative due to variations in their cell wall structures.

Opaqueness

The quality of being impenetrable by light; not transparent or translucent.

Decant

To pour a liquid from one container into another, usually to separate a solid from a liquid or to allow sediment to stay behind.

Clarity

The quality of being coherent and intelligible, or clear in thought or expression.