A Person Ties a Rock to a String and Whirls

question 31

Multiple Choice

A person ties a rock to a string and whirls it around in a vertical circle such that sometimes the rock is going straight upward and sometimes the rock is going straight down.She whirls the rock at the minimum speed (constant in time) such that the string is always taut (no sag) .If she were to use a longer string,she would have to whirl the rock at a

• A)higher velocity.
• B)lower velocity.
• C)the same velocity.

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Definitions:

Appearance

The way in which someone or something looks or is presented to the senses.

Egocentrically

Thinking solely from one's own viewpoint, often with difficulty in understanding or considering the perspectives of others.

Preoperational Stage

A stage in Piaget's theory of cognitive development, where children from about 2 to 7 years old develop memory and imagination.

Small-Scale Room

A room or environment specifically designed or scaled down to facilitate controlled experiments or observations in a contained setting.