Homework Help: physics, math, science

Posted by Serena on Saturday, October 1, 2011 at 10:19pm.

a soccer ball is kicked on the ground at 8m/s. another player is standing 30 m away.
if she needs to intercept it at 20m - how much time does she have and how fast must she run?

physics, math, science - drwls, Sunday, October 2, 2011 at 7:34am
"30 cm away" does not adequately describe her location relative to the path of the ball.
physics, math, science - tchrwill, Sunday, October 2, 2011 at 11:40am
Assuming the ball is kicked toward the other player:

The ball reaches the 20m point in t = 20/8 = 2.5 sec. meaning the receiver must run at the speed of 10/2.5 = 4m/s to intercept the ball in the same 2.5sec. time period.

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