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

question 50

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:

23rd Chromosome

One of the pair of chromosomes responsible for determining the sex of an individual, with XX typically denoting female and XY typically denoting male.

Sex Chromosomes

The chromosomes (X and Y) responsible for determining the biological sex of an organism.

Spermarche

The beginning of development of sperm in boys’ testicles at puberty, marking the onset of adolescent fertility.

Testes

The male reproductive glands that produce sperm and the hormone testosterone.