Two Cars Approach Each Other and Collide Head-On

question 76

Multiple Choice

Two cars approach each other and collide head-on.Car 1 has a mass of 800 kg and a velocity of -20 m/s.Car 2 has a mass of 1000 kg and a velocity of +16 m/s.They have an inelastic collision,but don't stick to each other.After the collision,car 1 has a velocity of 5 m/s.What is the fraction of kinetic energy lost?

• A)94%
• B)89%
• C)50%
• D)37%
• E)18%

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Definitions:

Free Association

A psychoanalytic therapy technique where patients verbalize all thoughts that come to mind without censorship, used to explore the unconscious mind.

Freudian Psychologists

Psychologists who follow the theories of Sigmund Freud, particularly those related to the unconscious mind, psychosexual stages, and defense mechanisms.

Systematic Desensitization

A behavioral therapy technique used to reduce phobia and anxiety through gradual exposure to the feared object or situation combined with relaxation techniques.

Extinction

In behavioral psychology, the gradual weakening of a conditioned response that results in the behavior decreasing or disappearing.