Posted by Serena on .
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,
"30 cm away" does not adequately describe her location relative to the path of the ball.

physics, math, science 
tchrwill,
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.