Answer:
I hope you can draw the roller coaster picture with two bumps
the first one greater than the other with the corresponding heights
Explanation:
For the Kinetic and Potential energy
use KE = 1/2mv^2 = 1/2*800*35^2 = 490 KJ
and PE equals the mgh = 800 *10 *31 = 248 KJ
g= acceleration due to gravity = 10