20 POINTS:
Why does the initial hill of a roller coaster need to be steep?

A roller coaster does not have an engine to generate energy. The climb up the first hill is accomplished by a lift or cable that pulls the train up. This builds up a supply of potential energy that will be used to go down the hill as the train is pulled by gravity

Hope this helps! Good luck with future homework and exams!

b

explanation:

no

sodium is solid at rt