Negative Work Can Be Done

question 40

Multiple Choice

Negative work can be done:

• A)by friction on the tyres while a car is accelerating without skidding.
• B)by a spring at the bottom of an elevator shaft when it stops a falling elevator.
• C)by a hand catching a ball.
• D)by all of the above.
• E)only by (b) and (c) above.

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Definitions:

Fees for Service

Charges imposed for specific services provided by professionals or organizations, often based on the service's complexity or the time required to perform it.

Earned Income

Income generated from the sale of goods and services, distinguishing it from donations or grants in nonprofit organizations.

Feasibility Study

An analysis conducted to assess the practicality and potential success of a proposed project or venture, considering factors like economic, technological, legal, and scheduling constraints.

Community Need

The demands or requirements essential for the wellbeing and improvement of a specific community.