A 10-Kg Object Is Dropped from Rest

question 45

Multiple Choice

A 10-kg object is dropped from rest. After falling a distance of 50 m, it has a speed of 26 m/s. What is the change in mechanical energy caused by the dissipative (air) resistive force on the object during this descent?

• A) −1.3 kJ
• B) −1.5 kJ
• C) −1.8 kJ
• D) −2.0 kJ
• E) −2.3 kJ

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Definitions:

Direct Contact

The physical transfer of microorganisms or substances between two people or between a person and a contaminated surface.

Pathogens

Microorganisms that can cause disease in their host, including bacteria, viruses, fungi, and parasites.

Unbroken Skin

Skin that has no cuts, scratches, or open wounds, serving as a protective barrier against infection.

Transmission

The act or process by which something is spread or passed from one person or thing to another, especially in the context of diseases or information.