Homework Help: physics

Posted by pavatharani on Tuesday, June 14, 2011 at 11:53am.

a body is thrown vertically upward return to the earth in 3sec.
(a)what was the initial velocity of the body
(b)what height did the body reach?
neglect the resistance of air.

physics - bobpursley, Tuesday, June 14, 2011 at 12:10pm
a. hf=ho+vi*t-4.8t^2

hf,ho are zero, solve for vi

b. same equation,t=1.5

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