A 20-Kg Block Slides Down a Plane (Inclined at 40 $\degree$

question 28

Multiple Choice

A 2.0-kg block slides down a plane (inclined at 40 $\degree$ with the horizontal) at a constant speed of 5.0 m/s.At what rate is the gravitational force on the block doing work?

• A)+98 W
• B)+63 W
• C)zero
• D)+75 W
• E)-75 W

---

Definitions:

Associative Agnosia

A disorder characterized by the inability to recognize objects despite being able to perceive them, due to a disconnection between perception and cognitive processing of that perception.

Recognizing Faces

The cognitive process of identifying a human face from visual input, using features unique to individuals.

Matching Objects

Identifying objects that are alike or correspond in some way, often used as a cognitive task in various psychological studies.

Composite Face Illusion

A phenomenon where combining the top half of one face with the bottom half of another can lead to a misleading perception of facial identity.