Got Daim Bramage?

Introduction

The running joke on a soccer field after you head a particularly hard ball is, "Man, I wonder how many brain cells that killed?" Well, our experiment won't tell you how many brain cells you just killed, but it will tell you how much force hit your head. We taped an X250-1 to a size five soccer ball so we could figure that out.

Objective

The experiment determines the resulting impact forces when a size five soccer ball is dropped ten feet onto one's head.

Test Setup

We taped an X250-1 to a size five soccer ball, we then stood on the roof and had a soccer player stand ten feet below the ball. We dropped the ball and the soccer player proceeded to head it back to us. We repeated this process ten times.

Config.txt

PRODUCT_ID = X250-1
deadband = 100
DeadBandTimeout = 3
samplesperfile = 76800
statusindicators = Normal
SampleRate = 512

Soccer Ball with Accelerometer
Soccer Ball with Accelerometer

Results

Force of a Soccer Ball when it hits your head
Event
Peak G-Force
Peak Force
Time
Average Force
g
lbf
msec
lbf
1
136
4349
10
2822
2
140
4472
22
2119
3
156
4968
18
2773
4
167
5328
18
2822
5
147
4707
20
1876
6
128
4091
22
1961
7
145
4645
28
1643
8
141
4492
28
1975
9
156
4989
20
2526
10
190
6057
22
2314
Average
151
4810
21
2283

Soccer Ball to Head Impact

Discussion

After we analyzed all of the data, we came to the conclusion that a soccer ball dropped from ten feet in the air hits your head with an average force of 2283 Lbs during a brief period of 21 milliseconds. However, this is just dropping the ball from a roof. We realize that during a game when someone kicks the ball and it hits your head, the force (and pain) will be much greater.