Is my answer to part a correct ? and can someone answer part 2 and if i am wrong correct part a ?

In A, the left side is exactly what you should write, to lead you to the answer ... correct units and everything. But when you tried to walk across the 'equals' sign, you slipped, fell, and got demolished on the rocks below. "19.6" is not the product of the things on the left side. Do the arithmetic again please.

B. When the height doubles, so does the potential energy.

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

hope i

-lavira: )