Homework Help: physics

Posted by sofi on Thursday, July 8, 2010 at 9:06pm.

A child throws a snowball with horizontal velocity of 18m/s directly toward a tree, from a distance of 9.0m and a height above the ground of 1.5m. if the time interval is 0.50s, at what height above the ground will the snow ballhit the tree

physics - drwls, Friday, July 9, 2010 at 12:42am
The horizontal distance to the tree is 9 m/18 m/s = 0.5 s, but they have already told you that.

During the itme of flight, the snowball falls vertically
H = (1/2) g t^2 = 4.9*0.5^2 = 1.23 m

The snowball started out 1.5 m above ground and ends up 1.5-1.23 = 0.27 m above ground

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