A railroad car with a mass of 63,000 kg coasts along a level track at 1.3...

 

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A railroad car with a mass of 63,000 kg coasts along a level track at 1.3 m/s. It hits a stationary car with a mass of 50,000 kg. The cars connect together when they collide. How fast are they moving after the collision? A teenage driver backs into a bush at 2 mph. The impact stops the car. The car is not damaged. Later that day, they back into a fencepost at 2 mph. The impact stops the car. The bumper is dented by the fencepost. Use physics terms to explain why the bumper is not dented when the car backs into the bush. A railroad car with a mass of 63,000 kg coasts along a level track at 1.3 m/s. It hits a stationary car with a mass of 50,000 kg. The cars connect together when they collide. How fast are they moving after the collision? A teenage driver backs into a bush at 2 mph. The impact stops the car. The car is not damaged. Later that day, they back into a fencepost at 2 mph. The impact stops the car. The bumper is dented by the fencepost. Use physics terms to explain why the bumper is not dented when the car backs into the bush.

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To calculate the speed of the railroad cars after the collision we can use the principle of conserva... View the full answer