Engineering Answers

An object has a mass of 2 kg is dropped from the top of building 30 meters tall. The initial velocity is zero. As it falls, the object encounters air resistance that is equal to 1/3 v. What is the velocity and altitude of the object after 1.5 seconds?

Write a program which prints the name and lawyer of each client whose age is L or higher.

(L is age variable) 

A company just purchased an intelligent robot, which has a first cost of $80,000. Since the robot is

unique in its capabilities, the company expects to be able to sell it in 4 years for $95,000. (a) If the

company spends $10,000 per year in maintenance and operation of the robot, what will the company’s

MACRS depreciation charge be in year 2? Assume the recovery period for robots is 5 years and the

company’s MARR is 16% per year when the inflation rate is 9% per year. (b) Determine the book value

of the robot at the end of year 2.

A video recording system was purchased 3 years ago at a cost of $30,000. A 5-year recovery period

and DDB depreciation have been used to write off the basis. The system is to be replaced this year with

a trade-in value of $5000. What is the difference between the book value and the trade-in value?

Equipment for immersion cooling of electronic components has an installed value of $182,000 with an

estimated trade-in value of $40,000 after 15 years. For years 2 and 10, use DDB book depreciation to

determine (a) the depreciation charge and (b) the book value.

Pneumatics Engineering purchased a machine that had a first cost of $40,000, an expected useful life

of 8 years, a recovery period of 10 years, and a salvage value of $10,000. The operating cost of the

machine is expected to be $15,000 per year. The inflation rate is 6% per year and the company’s MARR

is 11% per year. Determine (a) the depreciation charge for year 3, (b) the present worth of the third-

year depreciation charge in year 0, the time of asset purchase, and (c) the book value for year 3

according to the straight line method.

An asset that is book-depreciated over a 5-year period by the straight-line method has BV3 = $62,000

with a depreciation charge of $26,000 per year. Determine (a) the first cost of the asset and (b) the

assumed salvage value.

Lee Company of Westbrook, Connecticut, manufactures pressure relief inserts for thermal relief and

low-flow hydraulic pressure relief applications where zero leakage is required. A machine purchased 3

years ago has been book-depreciated by the straight-line method using a 5-year useful life. If the book

value at the end of year 3 is $30,000 and the company assumed that the machine would be worthless

at the end of its 5-year useful life, (a) what is the book depreciation charge each year and (b) what was

the first cost of the machine?

A southwestern city has a contract with Firestone Vehicle Fleet Maintenance to provide maintenance

services on its fleet of city-owned vehicles such as street sweepers, garbage trucks, backhoes, and

carpool vehicles. The contract price is fixed at $45,000 per year for 4 years. If you were asked to convert

the future amounts into constant-value amounts per today’s dollars, what would the respective amounts

be? Assume the current market interest rate of 10% per year and inflation rate of 5% per year are

expected to remain the same over the next 4-year period.

Assume the inflation rate is 4% per year and the market interest rate is 5% above the inflation rate.

Determine (a) the number of constant-value dollars 5 years in the future that is equivalent to $30,000

now and (b) the number of future dollars that will be equivalent to $30,000 now.