You Do 116 J of Work While Pulling Your Sister

question 137

Multiple Choice

You do 116 J of work while pulling your sister back on a fritctionless swing, whose chain is 5.10 m long, until the swing makes an angle of 32.0° with the vertical. What is your sister's mass?

• A) 15.3 kg
• B) 13.0 kg
• C) 19.0 kg
• D) 17.6 kg

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Definitions:

Straight-Line

A method of calculating depreciation of an asset, which allocates an equal amount of depreciation to each year of the asset's useful life.

Sum-Of-Years' Digits

A depreciation method that accelerates the expense recognition, using a decreasing fraction of years remaining over the sum of the years' digits.

Double-Declining Balance

A method of accelerated depreciation which doubles the normal depreciation rate, reducing the asset's book value more quickly in its early years.

Salvage Value

The estimated residual value of an asset at the end of its useful life.