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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