A Box with a Weight of 50 N Rests on a Horizontal

question 65

Multiple Choice

A box with a weight of 50 N rests on a horizontal surface.A person pulls horizontally on it with a force of 15 N and it does not move.To start it moving, a second person pulls vertically upward on the box.If the coefficient of static friction is 0.4, what is the smallest vertical force for which the box moves?

• A)5 N
• B)12 N
• C)20 N
• D)25 N
• E)35 N

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Definitions:

Zygotic Cells

The cells that result from the fertilization of an egg by a sperm, marking the beginning of a new organism's development.

Epigenetic Marks

Changes in DNA and histone proteins that impact how genes are expressed, without modifying the DNA sequence.

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

Protein Molecules

Large biomolecules comprised of one or more long chains of amino acid residues which play critical roles in the body, including catalyzing metabolic reactions and DNA replication.