A Small Sphere Attached to a Light Rigid Rod Rotates

question 31

Multiple Choice

A small sphere attached to a light rigid rod rotates about an axis perpendicular to and fixed to the other end of the rod. Relative to the positive direction of the axis of rotation, the angular positions of the sphere are negative, its angular velocity is negative, and its angular acceleration is negative. The sphere is

• A) rotating clockwise and slowing down.
• B) rotating counterclockwise and slowing down.
• C) rotating clockwise and speeding up.
• D) rotating counterclockwise and speeding up.
• E) first rotating counterclockwise and then clockwise.

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Definitions:

Subtropics

Regions of the Earth immediately adjacent to the tropics, characterized by hot, often humid summers and mild to warm winters.

Loess

An essentially unconsolidated sediment consisting predominantly of silt, interpreted to be windblown dust, commonly of glacial origin.

Ice-Age Glaciers

Massive sheets of ice and snow that covered large parts of the Earth’s surface during the last glacial period, significantly altering the planet's surface and ecosystem.

Rain Shadow

A relatively dry region on the downwind side of a topographic obstacle, usually a mountain range; rainfall is noticeably less than on the windward side.