An Elevator Is Rising at Constant Speed

question 36

Multiple Choice

An elevator is rising at constant speed.Consider the following statements: I.the upward cable force is constant
II.the kinetic energy of the elevator is constant
III.the gravitational potential energy of the Earth-elevator system is constant
IV.the acceleration of the elevator is zero
V.the mechanical energy of the Earth-elevator system is constant

• A)all five are true
• B)only II and V are true
• C)only IV and V are true
• D)all but III are true
• E)only I, II, and IV are true

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Definitions:

Marginal Revenue Product

The additional revenue generated from employing one more unit of a resource.

Total Product

The total output of goods and services produced by a firm using given inputs within a specific time period.

Additional Unit

Refers to one more quantity of a good or service added to previous totals, often in contexts discussing costs or benefits.

Complementary Resources

Productive inputs that are used jointly with other inputs in the production process; resources for which a decrease in the price of one leads to an increase in the demand for the other.