Springs & Elastic Potential Energy Video Lessons

Example

# Problem: You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 12-m-high hill, then descends 18 m to the tracks lowest point. Youve determined that the spring can be compressed a maximum of 2.3 m and that a loaded car will have a maximum mass of 430 kg . For safety reasons, the spring constant should be 13 % larger than the minimum needed for the car to just make it over the top.What spring constant should you specify?What is the maximum speed of a 350 kg car if the spring is compressed the full amount?

###### Problem Details

You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 12-m-high hill, then descends 18 m to the tracks lowest point. Youve determined that the spring can be compressed a maximum of 2.3 m and that a loaded car will have a maximum mass of 430 kg . For safety reasons, the spring constant should be 13 % larger than the minimum needed for the car to just make it over the top.

What spring constant should you specify?

What is the maximum speed of a 350 kg car if the spring is compressed the full amount?