Homework Help: Physics

Posted by Sarah on Wednesday, January 18, 2012 at 7:37pm.

A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 11 m/s when the hand is 1.8 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)

Physics - bobpursley, Wednesday, January 18, 2012 at 7:50pm
hf=hi+ vi*t-4.9t^2
0=1.8+11t-4.9t^2

solve the quadratic equation for t.
Physics - Anonymous, Friday, February 17, 2012 at 8:29pm
2.39

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