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This learning module takes a look into the bioengineering world from the perspective of every day activities. The activity that this part of the module focuses is on kicking a soccer ball and the bones/joints, muscles and forces that are involved. This is the powerpoint supplement to the learning module. See PDF file with the same title for lesson plan. Target Grade: 6th
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Muscle and Movement: Soccer KickCatherine WilcoxMatthew MurphyAyden Lee Chi-Yu Sun04/30/2010 at Lincoln Middle School
How much do you know your body?•Smooth muscle-surrounding the lumen of
tubes
•Cardiac muscle- heart
•Skeletal muscle- are attached to bones
40-50% of total body weight
The human body contains more than 650 individual muscles
http://www.innerbody.com/image/musbov.html
Anatomy of a kick action • The major muscle in
kicking a soccer ball is
http://www.insolepro.co.uk/biomechanics.html
Quadricep group
Muscle flexion/extension
6 basic steps in soccer kicking• The approach• Plant foot• Swing limb loading• Hip flexion and knee
extension• Foot contact• Flow through
Soccer kick in slow motion
•http://www.youtube.com/watch?v=lBMA2wWuqh8
http://www.wldcup.com/news/2007/11/20071127_45465_soccer_news.html
Let’s kick a soccer ball
•http://www.youtube.com/watch?v=2FhMDGH2ahw&feature=PlayList&p=6D951EA58734D85A&playnext_from=PL&playnext=1&index=26 the longest shot!!!
http://newsimg.bbc.co.uk/media/images/41800000/jpg/_41800718_ronaldo_afp416.jpg
How much force do you apply for kicking a soccer?•Determine the approximate mass of your
leg•Determine the mass of a soccer ball•Find the velocity of the soccer ball•Find the velocity of the leg•Determine the force acting on the soccer
by your leg
Mass of your leg
My Weight: lbs x (1kg/2.2lb)= kg
Weight of Leg = .10 x my weight = .10 x kg =
kg
Mass of a soccer ball
Mass of Soccer Ball: MB = kg
Velocity of the soccer ball
Δx= Final Distance – Starting Distance
Δx = m - m = m•Time the ball is in the air:
seconds•Velocity: VB = Δx /t
VB = / = m/s
Velocity of the leg
•Momentum is the product of the mass and velocity of an object P= mv
VL = VBMB / ML
= m/s x kg / kg
= m/s
Force acting on the soccer ball a= Δv/t = (final velocity – velocity of the ball at rest) / time = ( m/s - m/s) / .2 seconds = m/s2
F = MBa
= kg x m/s2 = N
• The acceleration of the kicking leg, and the resultant velocity at impact, is determined by the muscle forces being applied by the kicker.
