While Spinning Down from 500 Rpm to Rest, a Flywheel $3.9 \mathrm {~kJ}$

question 115

Multiple Choice

While spinning down from 500 rpm to rest, a flywheel does $3.9 \mathrm {~kJ}$ of work. This flywheel is in the shape of a solid uniform disk of radius 1.2 m. What is the mass of this flywheel?

• A) 4.0 kg
• B) 3.4 kg
• C) 4.6 kg
• D) 5.2 kg

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Definitions:

WAIS

The Wechsler Adult Intelligence Scale, a widely used test designed to measure a person's cognitive ability or intelligence.

SAT Reasoning Test

A standardized test widely used for college admissions in the United States, assessing reading, writing, and math skills.

Stanford-Binet

The widely used American revision (by Terman at Stanford University) of Binet’s original intelligence test.

Mental Age

A measure of intelligence test performance devised by Binet; the chronological age that most typically corresponds to a given level of performance. Thus, a child who does as well as the average 8-year-old is said to have a mental age of 8.