<em>the correct option for this is B>></em>
A downhill skier traveling down a hill has a large amount of kinetic energy because of their mass and high velocity.
I think it is in Tales of Suspense #39 that the cover dated March 1963. May 1968 Iron Man #1 received its own title.
Rocks? not quite sure about this one but good luck and hope this helps! :)
