This Shows the speed of a soccer free kick and the Goalie to show how fast a keeper has to travel from post to post in order to block the ball.
In order to score from a distance of 23.8 yards out from the goal box, you need to know how hard to hit the ball. The average time it takes for a free kick to get from the its place of rest to the goal is 4 seconds.
First we will find the velocity of the ball. Velocity = Distance / Time V= 23.8/4 V= 5.95 Second to find the Force you need to hit the balll with you use Newtons Second Law of Motion Force= (Ball weight x Velocity)/ The time of contact between a player’s shoe and the ball Ball Weight = .45kg Velocity= 5.95 yrds/sec Time of Contact from players shoe to the ball= .05 seconds F= (.45 x 5.95)/.05 F= 53.55 Newtons
The Goalie has to travel 3.9 yards in 3 seconds because the wall blocks his view of the ball for 1 second
S = 3.9/3 S = 1.3 yds/sec
This means that the minimum speed the keeper can run from 1st post to second post is 1.3 yds/sec in order to block the ball.