A 20-N Force Acts Horizontally on a 10-N Block That Is

question 12

Multiple Choice

A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50.
-Suppose that the block now moves across the surface with constant speed under the action of a horizontal 3.0-N force. Which one of the following statements concerning this situation is false?

• A)The block is not accelerated.
• B)The net force on the block is zero newtons.
• C)The frictional force on the block has magnitude 3.0 N.
• D)The coefficient of kinetic friction between the block and the surface is 0.30.
• E)The direction of the total force that the surface exerts on the block is vertically upward.

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Definitions:

Digestive Activity

The complex process of breaking down food into absorbable components in the digestive system.

Salivary Activity

The production and release of saliva from the salivary glands in the mouth, which aids in digestion and helps maintain oral health.

Sympathetic Nervous System

Part of the autonomic nervous system that activates the body's rapid involuntary response to dangerous or stressful situations, often referred to as "fight or flight" response.

Parasympathetic Nervous System

A division of the autonomic nervous system that promotes relaxation and functions under normal, non-stressful conditions.