A 25-Kg Object Falls Vertically Downward in a Viscous Medium at at a Constant

question 15

Multiple Choice

A 2.5-kg object falls vertically downward in a viscous medium at a constant speed of 2.5 m/s. How much work is done by the force the viscous medium exerts on the object as it falls 80 cm?

• A) +2.0 J
• B) +20 J
• C) −2.0 J
• D) −20 J
• E) +40 J

---

Definitions:

Basicity

A measure of the ability of a compound to accept protons.

Nucleophilicity

A measure of a molecule or ion's strength as a nucleophile, or its ability to donate an electron pair to an electrophile.

Basicity

A measure of a substance's ability to donate electrons or accept protons, commonly applied in the context of acids and bases.

Nucleophilic

Characteristic of a chemical species that donates an electron pair to an electrophile to form a chemical bond in reaction.