A Rock of Mass M with a Density Twice That

question 85

Multiple Choice

A rock of mass M with a density twice that of water is sitting on the bottom of an aquarium tank filled with water. The normal force exerted on the rock by the bottom of the tank is

• A) 2Mg.
• B) Mg.
• C) Mg/2.
• D) zero.
• E) 3Mg.

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Definitions:

Projected Benefit Obligation

A measurement of the present value of future pension benefits earned to date as estimated by actuaries, used in accounting for pension plans.

Balance Sheet

A report detailing a company's assets, obligations, and the equity of its shareholders at a particular moment.

Projected Benefit Obligation

An actuarial estimate of the total present value of future retirement benefits earned to date, adjusted for expected future salary increases.

Prior Service Cost

The expense recognized in pension accounting when a plan is amended to increase benefits for service provided by employees in prior years.