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

---

Definitions:

Average Rates

The mean amount of a rate, such as interest or tax rate, calculated by totaling several rates and dividing by the number of rates.

Taxable Income

The portion of income that is subject to tax after all deductions and exemptions have been applied according to tax law.

Tax Liability

The total amount of tax that an individual or entity is legally obligated to pay to tax authorities.

Average Tax Rate

The portion of total taxable income that is paid in taxes, calculated by dividing the total tax amount by the total income.