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Home Q & A Board Science-Related Homework Help Physics
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einsteindude einsteindude
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9 years ago
Suppose you slowly, and at constant speed, lift a book weighing 12 N from the floor to a shelf 2 m above the floor. Neglect air resistance. While you are lifting, the net force on the book is       

A) zero.
B) 12 N directed downward.
C) 12 N directed upward.
D) more than 12 N, by an amount that depends on the speed of lifting.
E) less than 12 N, by an amount that depends on the speed of lifting.
Textbook 
Conceptual Physical Science

Conceptual Physical Science


Edition: 6th
Authors:
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mel!811mel!811
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