A Block of Ice Slides Freely [No Air Resistance, No

question 62

Multiple Choice

A block of ice slides freely [no air resistance, no friction] down a slippery slope. The block starts from rest at the top of the slope, where it has a vertical height of 4 m above the bottom of the slope and where it has a gravitational energy of 1000 J. At a quarter of the way down the slope, the block's gravitational energy is

• A) 250 J.
• B) 500 J.
• C) 750 J.
• D) 1000 J.
• E) less than 250 J.

---

Definitions:

Obsession

A persistent, intrusive, and unwanted thought or urge that causes distress or anxiety.

Unresolved Electra

A concept from Freudian psychology suggesting unresolved competition with the mother for the affection of the father.

Discontinuous Change

Developmental progress that occurs in distinct stages, with each stage bringing about new and different abilities or behaviors.

Plasticity

The capacity of the brain to change and adapt in structure and function in response to learning and experience.