Posted by **meg** on Saturday, September 13, 2008 at 9:45pm.

An object is thrown straight up. At the same instant that the object reaches its maximum height, a second object is dropped from this maximum height. Which object hits the ground first and why?

Also, a ball is thrown straight up. If the ball's initial velocity is considered positive, what is the acceleration of the ball while ascending? And how would you draw a vector diagram for this problem? Help me please! thanks.

- physics -
**bobpursley**, Saturday, September 13, 2008 at 9:47pm
Do this. Please give me your thinking on this, and let me critique. It will help you more doing it that way.

- physics -
**meg**, Sunday, September 14, 2008 at 10:53pm
Well i think that the one that is dropped from the maximum height will hit the ground first because it doesn't have negative velocity like the one thrown from the ground has.

And the second question I don't understand at all? Please help. and thank you.

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