An 80-Kg Block Is Released from Rest, with V1 = 0

question 52

Multiple Choice

An 8.0-kg block is released from rest, with v1 = 0.00 m/s, on a rough incline, as shown in the figure. The block moves a distance of 1.6-m down the incline, in a time interval of 0.80 s, and acquires a velocity of v2 = 4.0 m/s. How much work does gravity do on the block during this process?

• A) +81 J
• B) +100 J
• C) +120 J
• D) -81 J
• E) -100 J

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Definitions:

Loftus

Refers to Elizabeth Loftus, a cognitive psychologist known for her work on the malleability of human memory and the misinformation effect.

Trial Witnesses

Individuals who provide testimony in court cases based on what they have seen, heard, or have expert knowledge about.

Misinformation

Incorrect or misleading information that can create false beliefs or memories.

Frederic Bartlett

A pioneering psychologist known for his work on memory and cognitive psychology, emphasizing the importance of schemas in understanding and remembering.