A Man Pushes an 80-N Crate a Distance of 5

question 27

Multiple Choice

A man pushes an 80-N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30°with the horizontal.The force he exerts is parallel to the slope.If the speed of the crate is constant, then the work done by the man is:

• A)-200 J
• B)61 J
• C)140 J
• D)200 J
• E)260 J

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Definitions:

Cytology

The branch of biology that studies cells, their structure, function, and significance in health and disease.

Molecular Biology

Molecular biology is the branch of biology that focuses on the molecular basis of biological activity, including the interactions between DNA, RNA, proteins, and their synthesis.

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The branch of science that studies microorganisms, including bacteria, viruses, fungi, and protozoa.

Histology

The study of the microscopic anatomy of cells and tissues of plants and animals.