Recent content by dayyou

thebigstar25 is correct, this is all about Conservation of Energy. Potential Energy at the start is equal to the Kinetic Energy at the bottom. And since you know the Force and Acceleration, you can figure out Mass. (F=ma) Then just plug it into the equation for PE (PE=mgh).

S_Happens definitely put what I was trying to convey into words that actually made sense, haha.

No, not yet. Only a sophmore in high school. If those concepts A) are on the SAT and B) help me find the answer, an explanation would be very appreciated.

Try thinking in terms of the real world. If you are walking at 15 mph, and a 3 mph gust of wind hits you from the front, do you feel more resistance or less (ie, would you add the 3 mph or subtract it)?

Homework Statement Give an example of a vector perpendicular to [6,2,3] that has the same length.Homework Equations Distance formula between two points on a 3D plane: Sqrt[(X1-X2)2 + (Y1-Y2)2 + (Z1-Z2)2]The Attempt at a Solution In 2D space, the perpendicular vector of [X,Y] is [-Y,X]...