A Pencil That Is 15

question 59

Multiple Choice

A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table.The eraser does not slip as it tips over.Treat the pencil like a uniform rod.What is the angular speed of the pencil just before it hits the table?

• A)13.7 rad/s
• B)7.23 rad/s
• C)3.70 rad/s
• D)24.5 rad/s
• E)16.8 rad/s

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Definitions:

Dopamine

A neurotransmitter important in reward, motivation, and motor control, often linked to pleasure and addiction.

Neurotransmitter

Chemical substances that transmit signals across a synapse from one neuron to another neuron or to a target cell.

Amphetamine

A potent central nervous system stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and for weight loss, but can also be abused as a recreational drug.

Tranquilizers

Medications used to reduce tension or anxiety, often by depressing the central nervous system.