When a Spinning Ice Skater Pulls in His Arms,he Spins

question 67

Multiple Choice

When a spinning ice skater pulls in his arms,he spins faster because

• A)his angular momentum must be conserved,so reducing his radius must increase his speed of rotation.
• B)there is less friction with the air.
• C)there is less friction with the ice.
• D)there exists an unbalanced reaction force.

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Definitions:

Encoding Specificity

The principle that recall is more effective if the context at the time of encoding matches the context at the time of retrieval.

Cognitive Economy

A principle in cognitive psychology that suggests the brain strives to simplify information processing by using the most efficient and simplest ways to understand and process information.

Spreading Activation

A theory in cognitive psychology that suggests ideas in memory are connected and that the activation of one idea can trigger the activation of related ideas.

Lexical Decision Tasks

A psychological experiment that involves determining whether a string of letters is a word or a non-word.