lax400

uhh.. how do i do that...

uhh what do all the variables stand for...?

umm no sorry im only in 9th grade =\

A boulder with a mass of 2,500kg on a ledge 200m above the ground falls. What is the speed of the boulder just before it hits the ground. To find velocity you need to use the kinetic energy formula right? But when I tried to plug in everything, it wouldn't work. IT only looks as if the GPE formula would work... could someone help me please?