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%

Question

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%

Quizplus · Accepted Answer

The Answer of 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%

Two Cars Approach Each Other and Collide Head-On