Recent content by enapper

That makes sense. "The whole is equal to the sum of the parts" sort of thing. Thanks a million!

Thanks! mgh=mgh(2)-1/2mv^2(2) I canceled out the mass because it should be the same throughout the equation and no mass is given, leaving me with: gh=gh(sub2)-1/2v^2(sub2) (9.8)(h)=(9.8)(28.5)-(1/2)(15.8)^2 9.8h=279.3-124.82 h=154.48/9.8 h=15.76 This answer seems illogical...

A roller coaster starts at height (h). It goes down this hill and then goes up a second hill that is at a height of 28.5 m at a speed of 15.8 m/s. How high was the initial hill? Given equations: U=mgh KE=1/2mv^2 W=Fd P=W/T Honestly, we've never done a problem like this before and...