How Much Work Must Be Done by Frictional Forces in Slowing

question 109

Multiple Choice

How much work must be done by frictional forces in slowing a 1000-kg car from $26.1 \mathrm {~m} / \mathrm { s }$ to rest?

• A) 3.41 × 10⁵ J
• B) 2.73 × 10⁵ J
• C) 4.09 × 10⁵ J
• D) 4.77 × 10⁵ J

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Definitions:

Ion Concentration

The measure of the number of ions in a particular volume of solution, impacting electrical conductivity, pH, and various biological processes.

Plasma Membrane

A selective barrier that surrounds a cell, controlling the movement of substances in and out of the cell.

Sliding Filament Model

A theory explaining the mechanism of muscle contraction through the sliding of actin (thin) filaments over myosin (thick) filaments, shortening the sarcomere.

Muscle Contraction

The process where muscle fibers shorten or lengthen to produce movement or maintain posture.