A2L Item 167

• Description: Identify the angular velocity of a mass reaching the bottom of a vertical circular track.
• Goal: Problem solving
• Source: UMPERG-ctqpe118
• Keywords: Conservation, Energy, Mechanics, Rotational Motion, Velocity

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The question for students:

A mass m slides down a frictionless track of radius R=0.5m. As the mass reaches the bottom, relative to the center of curvature, its angular velocity is most nearly:

1. 6 rad/sec
2. 8 rad/sec
3. 12 rad/sec
4. 15 rad/sec
5. 20 rad/sec
6. Cannot be determined

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Commentary for teachers:

Answer

(1) The velocity near the bottom can be found using energy conservation.

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