Sally, Who Weighs 450 N, Stands on a Skate Board

question 38

Multiple Choice

Sally, who weighs 450 N, stands on a skate board while Roger pushes it forward 13.0 m at constant velocity on a level straight street. He applies a constant 100 N force.

• A) The work Roger does on the skateboard is 0 J.
• B) The work Roger does on the skateboard is 1 300 J.
• C) The work Sally does on the skateboard is 1 300 J.
• D) The work Sally does on the skateboard is 5 850 J.
• E) The work Roger does on the skateboard is 5 850 J.

---

Definitions:

Prefrontal Cortex

The part of the brain located at the front of the frontal lobe, involved in complex behaviors such as planning, decision making, and moderating social behavior.

Hippocampus

A major component of the brain in humans and other vertebrates, playing critical roles in the consolidation of information from short-term to long-term memory and in spatial memory that enables navigation.

Corpus Callosum

A thick band of nerve fibers that divides the cerebral cortex lobes into left and right hemispheres, facilitating communication between the two sides of the brain.

Thalamus

A structure in the brain that acts as a relay station for transmitting sensory and motor signals to the cerebral cortex.