If no friction acts on a diver during a dive, then which of the following statements is true?
A. The total mechanical energy of the system increases.
B. Potential energy can be converted into kinetic energy but not vice versa.
C. (KE+ PE)beginning = (KE + PE)end
D. all of the above

Question

If no friction acts on a diver during a dive, then which of the following statements is true?
	A. The total mechanical energy of the system increases. 	
	B. Potential energy can be converted into kinetic energy but not vice versa. 	
	C. (KE+ PE)beginning = (KE + PE)end 	
	D. all of the above

anonymous · Answer

i know it is not (B)

ganeshie8 · Answer

if no friction losses, then there is no waste in energy.

ganeshie8 · Answer

you're left with the same energy in the end as you had in the beginning

anonymous · Answer

You don't stop. If you started off with 10,000J without any losses! That value stays the same until a force acts open it.