11. Momentum & Impulse
Completely Inelastic Collisions
11. Momentum & Impulse Completely Inelastic Collisions
5PRACTICE PROBLEM
Bumper technology in vehicles is designed to absorb and store kinetic energy in case of a collision, then release it to the vehicles as they separate. The efficiency of the technology decreases as collision speed increases. During a design analysis by a manufacturer, a car of mass 900 kg is headed east at 1.40 m/s when it collides with a car of mass 650 kg headed west at 1.20 m/s. Analysis of the after-collision period shows that the 900 kg Car is moving at 0.180 m/s in its original direction. What is the change in the overall kinetic energy of the two cars for the collision? Ignore friction.
Bumper technology in vehicles is designed to absorb and store kinetic energy in case of a collision, then release it to the vehicles as they separate. The efficiency of the technology decreases as collision speed increases. During a design analysis by a manufacturer, a car of mass 900 kg is headed east at 1.40 m/s when it collides with a car of mass 650 kg headed west at 1.20 m/s. Analysis of the after-collision period shows that the 900 kg Car is moving at 0.180 m/s in its original direction. What is the change in the overall kinetic energy of the two cars for the collision? Ignore friction.