A Lunar Module Weighs 16 Tons on the Surface of Earth

question 57

Multiple Choice

A lunar module weighs 16 tons on the surface of Earth. How much work is done in propelling the module from the surface of the moon to a height of 50 miles? Consider the radius of The moon to be 1100 miles and its force of gravity to be one-sixth that of Earth.

• A) \(1.35 \times 10 ^ { 12 } \mathrm { ft } - \mathrm { lb }\)
• B) \(1.35 \times 10 ^ { 9 } \mathrm { ft } - \mathrm { lb }\)
• C) \(6.73 \times 10 ^ { 8 } \mathrm { ft } - \mathrm { lb }\)
• D) \(4.09 \times 10 ^ { 9 } \mathrm { ft } - \mathrm { lb }\)
• E) \(4.09 \times 10 ^ { 12 } \mathrm { ft } - \mathrm { lb }\)

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Definitions:

Percent of Sales Method

A financial planning tool used to forecast future revenues, expenses, or balance sheet figures as a percentage of sales.

Uncollectible Accounts Receivable

Accounts receivable that are considered to be uncollectible due to the inability of the customers to pay.

Journal Entries

Recorded transactions in the accounting system, documenting financial changes in accounts.

Percent of Sales

Percent of sales is a financial analysis tool that helps in estimating how certain accounts, like revenue and expenses, will vary in proportion to changes in sales.