A Pencil That Is 15

question 8

Multiple Choice

A pencil that is 15.7 cm Iong 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) 3.70 rad/s
• B) 13.7 rad/s
• C) 24.5 rad/s
• D) 7.23 rad/s
• E) 16.8 rad/s

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Definitions:

Plate Tectonics

The scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of the Earth's lithosphere.

Biogeographers

Scientists who study the distribution of species and ecosystems in geographic space and through geological time.

Paleobiologist

A scientist who studies ancient life and ecosystems through the examination of fossilized remains and geological context, aiming to understand the evolution of life on Earth.

Marine Invertebrate Fossils

Fossils of animals that lived in the sea and did not possess a vertebral column, important for understanding Earth's history and evolution.