A 20-Kg Block Slides Down a Fixed,rough Curved Track

question 47

Multiple Choice

A 2.0-kg block slides down a fixed,rough curved track.The block has a speed of 5.0 m/s after its height above a horizontal surface has decreased by 1.8 m.Assume the block starts from rest.What is the change in mechanical energy of the block caused by the force of friction during this descent?

• A)-14 J
• B)-12 J
• C)-10 J
• D)-16 J
• E)-25 J

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Definitions:

Thalamus

A part of the brain that acts as a relay station, processing and transmitting sensory information to various areas of the brain.

Temporal Lobes

Temporal lobes are parts of the brain located on either side of the head above the ears, involved in processing auditory information and are key in the formation of memories.

Buzzing Sound

A continuous, low-pitched noise resembling the sound produced by bees or similar insects.

Right Frontal Lobe

A region of the frontal lobe of the brain located in the right hemisphere, responsible for controlling important cognitive skills, such as emotional expression, problem-solving, memory, and judgment.