Homework Help: physics

Posted by Luckna on Wednesday, October 8, 2008 at 9:33am.

An object is thrown vertically upward with a speed of 19.1 m/s. How high does it rise?

I get 1.86e+01 m

How long does it take to reach this highest altitude?

I get 1.95e+00 s

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I am stuck on part c, however, which asks How long does it take the object to hit the ground after it reaches the highest altitude?

physics - bobpursley, Wednesday, October 8, 2008 at 9:45am
It takes the same time as it did going upwards.

OR you can dwork it out..final position is zero, intial position is zero..

hf=hi+vi*t+ 1/2 g t^2 where g is -9.8m/s^2
solve for t.

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