Which is true? Energy is produced by living things. Energy cannot be changed from one thing to another Energy can change from one form to another. Energy can only change into heat energy.

What challenges did you encounter during the circuit training program?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.