A Boy Pulls a Wooden Box Along a Rough Horizontal

question 56

Multiple Choice

A boy pulls a wooden box along a rough horizontal floor at constant speed by means of a force as shown.In the diagram f is the magnitude of the force of friction, N is the magnitude of the normal force, and F_g is the magnitude of the force of gravity.Which of the following must be true?

• A)P = f and N = F_g
• B)P = f and N > F_g
• C)P > f and N < F_g
• D)P > f and N = F_g
• E)none of these

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Definitions:

Compounded Monthly

The process of calculating interest on an investment monthly and adding it to the principal, resulting in interest earned on the previous interest.

Ordinary Annuity

An annuity in which the payments are made at the end of each payment interval.

Monthly Payments

Regular payments made every month, often in the context of loans or leases, to repay borrowed money plus interest.

Compounded Annually

The process of calculating interest on both the initial principal and the accumulated interest from previous periods on an annual basis.