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# SCIENCE BEHIND LACROSSE

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## hunter hutchings

on 27 April 2015

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#### Transcript of SCIENCE BEHIND LACROSSE

SECOND LAW:
F=MA
The force of the stick on the ball = the mass of stick x the acceleration of the motion of the stick.
F=MA
Force of the ball in the air = mass of ball x acceleration of the ball from the force of the throw.
THIRD LAW:
EAQAL AND OPPISITE FORCES
NEWTON'S LAWS
INERTIA
Lacrosse is a contact sport in witch players use sticks with netted pockets in which the ball is held by "cradling".
SCIENCE BEHIND LACROSSE
FIRST LAW: INERTIA
Inertia results in motion, action, and effort.
INERTIA
- This friction increases with stretching because it then travels along a larger distance.
When catching the ball in the pocket of the stick, the ball pushes back on the stick. In order for the player to not lose control of the stick and ball, the player must push back with an equal force on the stick.
INTRODUCTION
The players pass the ball back and fourth in order to throw the ball at the net to score.
Players can use their bodies to "check" or impede other players on the field.
Lacrosse is a sport in which many basic concepts of physics are utilized and apply to the differing elements of the game.
The ball is at rest for the face off and it will remain at rest until acted upon by a players stick.
Force on the stick forward = the force which is exhausted by the mesh stretching and exhausted by friction with the mesh.
- This motion and acceleration depends on the strength and ability of the player.
Force of moving player = the mass of player x acceleration of player from the strength of muscles to push off the ground to run.
SHOOTING AND PASSING
PASSING
KE=1/2M x V^2
The more KE the thrown ball has, the greater the distance will travel
Offensive players want sticks that will allow the ball to be thrown from the defensive end of the field to the offensive end of the field
PASSING
The shorter and lighter the sticks are the best because mass is decreased with a shorter length so the stick and ball's velocity increases, which increases KE.
SHOOTING
A shot or pass is a rotary motion affected by the kinetic chain of segments that remain the same with the body from planting one foot and swinging the stick
SHOOTING
Q
U
I
C
K
Q
U
I
Z
1) How does passing the ball relate to velocity?
2) What is
Inertia
?
INERTIA
: The property of matter by which it retains its state of rest or its velocity along a straight line as it is acted upon by an external force.
3) What is the equation for
Kinetic Energy
?
DEFENSE
Force the player's moves to be lateral and away from the net.
By keeping the player away from the net you not only cut down their angle on the goal, but also prevent them from gaining forward momentum.
SOURCES
http://jocelyn921.glogster.com/physics-of-lacrosse/
http://www.unc.edu/~borbas/physics/sources.html
By:Hunter Hutchings
http://www.athleticedgelacrosse.com/science.html
Momentum ;
p=mv

The forward momentum of the player would directly contribute to the momentum of the ball as the ball is part of the overall system.
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