1. How fast must the skateboarder be going at the bottom of the hill in order to coast over the hill? Assume the skateboarder is not doing any work on the way up the hill to increase their speed, and assume that
friction and air resistance are negligible.

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

the answer would be   dignified - apex

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.

elctricity and magnet is conversion to it