Recent content by pcwizz

hey guys, i worked it out and got close to -30J. It seems a bit better now. Is this correct?

it wouldn't have anything to do with gravitational potential energy would it? im not too sure however

Homework Statement This question came up recently, and i personally have been weak regarding work and energy, i have only just started to understand Newtons laws sufficiently. There is a scan of the question attached. Could i please have an explanation this question? A 0.5-kg mass is...