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:

Batesian Mimicry

A form of mimicry where a harmless species evolves to imitate the warning signals of a harmful species to deter predators.

Poison Arrow Frog

A group of brightly colored frogs, native to tropical Central and South America, known for the potent toxin secreted through their skin.

Chemical Defenses

Strategies involving the production of chemical substances by organisms to deter predation, infection, or competition.

Mutualism

A type of symbiotic relationship between two species where both parties benefit from the interaction.