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Physics of Lacrosse

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Jake Field

on 30 May 2012

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Transcript of Physics of Lacrosse

Jake Field Physics of Lacrosse History

Basic Info

Newton's 1st Law

Newton's 2nd Law

Equal and Opposite Forces

Torque and Lever Arm Preview Native Americans


Today History Rules


Basic Info Faceoffs Newton's 1st Law The ball will remain at rest until acted upon by an outside force, the player's stick. Cradling The ball in the netted pocket of the stick will remain motionless, until the player “cradles” the ball in an arc-like shape so that it stays in the pocket
Checking/ Defense A player in motion will remain in that motion unless acted upon by another player, for example, when he is checked. His motion may stopped or reversed
F = MA Newton's 2nd Law Force of stick on ball = mass of stick X acceleration of the motion of the stick

Force of the ball in the air = mass of ball X acceleration of the ball from the force of the throw

Force of moving player = mass of player X acceleration of player from the strength of muscles to push off of the ground to run

If Paul Rabil has a ball in his stick that weighs 5 oz. and shoots a shot equal to his world record 111 mph, how much force is exerted on the ball? Word Problem F= MA
F= 111 mph x 5 oz
F = 555 N of force on the ball

Catching Equal and Opposite Forces F is proportional to the A of the ball When catching a 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 but opposite force on the stick Checking When a player checks another player, the forces of each stick on the other must be equal, however, sometimes one stick may continue in motion while the other thrown is backwards in the opposite direction for one of two reason:
1. One player was moving and the other was motionless
2. The momentum of the first player was greater than the second player

Torque and Lever Arm When carefully examining the physics of a lacrosse pass, the lever arm created proves important for building the appropriate throwing motion. In order to throw the ball from the netted pocket, pull the stick backward with the bottom hand and push it forward with the upper hand. This motion creates a lever arm that will direct the ball forward with the centripetal force you have created with the stick. By pivoting the stick through your upper hand, creating force in both the upper and lower hands, you generate large torque forces and throw the ball great distances. History

Basic Info

Newton's 1st Law

Newton's 2nd Law

Equal and Opposite Forces

Torque and Lever Arm Review
Full transcript