62. Just after a motorcycle rides off the end of a ramp and launches into the air, its engine is turning counterclockwise at 7700 rev/min. The motorcycle rider forgets to throttle back, so the engine's angular speed increases to 12 500 rev/min. As a result, the rest of the motor- cycle (including the rider) begins to rotate clockwise about the engine at 3.8 rev/min. Calculate the ratio Ig//m of the moment of inertia of the engine to the moment of inertia of the rest of the motorcycle (and the rider). Ignore torques due to gravity and air resistance.

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Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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62. Just after a motorcycle rides off the end of a ramp and launches
into the air, its engine is turning counterclockwise at 7700 rev/min.
The motorcycle rider forgets to throttle back, so the engine's angular
speed increases to 12 500 rev/min. As a result, the rest of the motor-
cycle (including the rider) begins to rotate clockwise about the engine
at 3.8 rev/min. Calculate the ratio Ig//m of the moment of inertia of
the engine to the moment of inertia of the rest of the motorcycle (and the
rider). Ignore torques due to gravity and air resistance.
Transcribed Image Text:62. Just after a motorcycle rides off the end of a ramp and launches into the air, its engine is turning counterclockwise at 7700 rev/min. The motorcycle rider forgets to throttle back, so the engine's angular speed increases to 12 500 rev/min. As a result, the rest of the motor- cycle (including the rider) begins to rotate clockwise about the engine at 3.8 rev/min. Calculate the ratio Ig//m of the moment of inertia of the engine to the moment of inertia of the rest of the motorcycle (and the rider). Ignore torques due to gravity and air resistance.
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