A Block Is Pushed Across a Rough Horizontal Surface from Point

question 14

Multiple Choice

A block is pushed across a rough horizontal surface from point A to point B by a force (magnitude P = 5.4 N) as shown in the figure. The magnitude of the force of friction acting on the block between A and B is 1.2 N and points A and B are 0.5 m apart. If the kinetic energies of the block at A and B are 4.0 J and 5.6 J, respectively, how much work is done on the block by the force P between A and B?

• A)2.7 J
• B)1.0 J
• C)2.2 J
• D)1.6 J
• E)3.2 J

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Definitions:

IUPAC Name

The systematic naming of chemical compounds according to the rules set by the International Union of Pure and Applied Chemistry.

Orbital

A region around the nucleus of an atom where there is a high probability of finding an electron.

Lone Pair Electrons

Pairs of valence electrons that are not shared with another atom and are localized on a single atom in a molecule.

Azeotropic Mixture

A mixture of two or more liquids that maintains its composition and boiling point during distillation, making it impossible to separate by distillation.