A 20-Kg Object Moves in a Straight Line on a Horizontal

question 77

Multiple Choice

A 2.0-kg object moves in a straight line on a horizontal frictionless surface.
The graph shows the velocity of the object as a function of time. The various equal time intervals are labeled using Roman numerals: I, II, III, IV, and V. The net force on the object always acts along the line of motion of the object.
-Which section(s) of the graph corresponds to a condition of zero net force?

• A)V only
• B)III only
• C)II and IV
• D)II, III, and IV
• E)I, III, and V

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Definitions:

Preconventional

A stage of moral development where an individual's sense of morality is externally controlled, based primarily on the consequences of actions.

Allowance

An amount of money given at regular intervals for a specific purpose, or the act of permitting something.

Overregularization

A language acquisition error where children apply general grammar rules too widely.

First Word

The initial instance of meaningful spoken language produced by a child.