An Automobile Approaches a Barrier at a Speed of 20

question 13

Multiple Choice

An automobile approaches a barrier at a speed of 20 m/s along a level road. The driver locks the brakes at a distance of 50 m from the barrier. What minimum coefficient of kinetic friction is required to stop the automobile before it hits the barrier?

• A)0.4
• B)0.5
• C)0.6
• D)0.7
• E)0.8

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Definitions:

Self-Regulating Market

A market mechanism in which market forces such as supply and demand are allowed to operate freely without external intervention, theoretically leading to efficient outcomes.

Say's Law

An economic theory that proposes supply creates its own demand, meaning production inherently creates the consumption of equivalent value.

Aggregate Supply Curve

This represents the total supply of goods and services that firms in an economy are willing to sell at a given price level during a specified time period.

Macroeconomic Equilibrium

A state where aggregate supply equals aggregate demand, resulting in a stable economy without tendencies to change.