A 20-Kg Block Slides Down a Plane (Inclined at 40° with with the Horizontal)

question 46

Multiple Choice

A 2.0-kg block slides down a plane (inclined at 40° with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?

• A) +98 W
• B) +63 W
• C) zero
• D) +75 W
• E) −75 W

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Definitions:

Structural Formula

A graphical representation of a molecular structure, showing how atoms are arranged and bonded together within a molecule.

Acetone

A volatile, colorless solvent known for its ability to dissolve many plastics and synthetic fibers, characterized by its simplest ketone structure.

Lewis Structure

A graphical representation of the valence electrons of atoms in a molecule, showing how the electrons are arranged around atoms.

Acetic Acid

An organic compound with the formula CH3COOH, known as the main component of vinegar besides water.