A Wheel Starting from Rest Has a Constant Angular Acceleration

question 55

Multiple Choice

A wheel starting from rest has a constant angular acceleration.After 3.0 s the angular velocity of the wheel is 7.5 rad/s.This same angular acceleration continues for a further 7.0 s after which it drops suddenly to zero.In the first 20.0 s how many revolutions does the wheel make?

• A)20
• B)40
• C)60
• D)80
• E)100

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Definitions:

Volume

A measurement of the amount of space an object or substance occupies.

Boyle's Law

A gas law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.

Proportional

Proportional describes a relationship between two quantities where their ratio remains constant.

Compressed

The state of being pressed into less space or condensed under pressure.