A 25-Kg Box Is Sliding Down an Ice-Covered Hill

question 10

Multiple Choice

A 25-kg box is sliding down an ice-covered hill.When it reaches point A, the box is moving at 11 m/s.Point A is at the bottom of a circular arc that has a radius R = 7.5 m.What is the magnitude of the normal force on the box at Point A?

• A)250 N
• B)280 N
• C)400 N
• D)650 N
• E)900 N

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Definitions:

Endoderm

The innermost layer of cells or tissues of an embryo in early development, or the lining of the digestive and respiratory tracts in the mature organism.

Jellylike Matrix

A viscous, gelatinous substance that provides structural support and medium for cell components in various tissues, including the extracellular matrix of connective tissue.

Schistosomiasis

A disease caused by infection with freshwater parasitic worms in certain tropical and subtropical regions.

Typhus

A group of infectious diseases caused by Rickettsia bacteria, transmitted by lice, fleas, or mites, characterized by severe fever, headache, and rash.