A 20-Kg Block Slides on a Rough Horizontal Surface

question 27

Multiple Choice

A 2.0-kg block slides on a rough horizontal surface. A force (P = 6.0 N) is applied to the block as shown. The magnitude of the block's acceleration is 1.2 m/s². What is the magnitude of the force of friction acting on the block?

• A)2.0 N
• B)1.4 N
• C)1.6 N
• D)2.8 N
• E)3.4 N

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Definitions:

Acetylcholine

A neurotransmitter involved in both the peripheral and central nervous systems, playing a critical role in muscle contraction and potentially in memory formation.

Excitatory

Relating to or causing an increase in activity or efficiency in a nerve or muscle, often involving the release of neurotransmitters.

Parasympathetic Preganglionic Axons

Nerve fibers originating in the central nervous system that extend to a ganglion in the parasympathetic part of the autonomic nervous system.

Sacral Region

The area of the lower back and pelvis, encompassing the five sacral vertebrae fused together to form the sacrum.