Suppose You Slowly, and at Constant Speed, Lift a Book

question 61

Multiple Choice

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

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Definitions:

3,6-dimethylcyclohexene

An organic compound with a six-membered ring structure, having methyl groups attached at the 3rd and 6th positions.

Dry Gaseous HBr

Hydrogen bromide gas that is free from water, often used in organic synthesis as a reagent.

Step-by-step Mechanism

A detailed description of every stage in a chemical reaction, explaining the process by which reactants convert into products.

Major Product

The product of a chemical reaction that is formed in the greatest amount, often favored by thermodynamic or kinetic control.