Posted by **Anonymous** on Monday, January 25, 2010 at 7:34pm.

A 10 N toy rocket is fired straight up [KE= 40 J]. At the very top of its trip, the total mechanical energy= 140 J. What was the final maximum height reached?

When I tried to solve the problem, I got 10 m for the answer. Can anyone tell me whether or not that's the right answer?