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| matter- any substance taht occupies space is mass. objects that have mass are attracted to other objects taht have mass |
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| the gravitational pull on the body towards the earth. |
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| the more mass an object has the more inertia it has. Inertia means resistance to change. |
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| scalar measure indicating how fast an object is traveling at a particular instant in time. |
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| a more precise description of speed. both speed and direction. How fast and in what direction. |
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| The earths gravitational pull on an object is concentrated at the athletes center of gravity. the center of gravity is the naval region. |
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| the amount of substance or mass contained in a particular space. |
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| the distance that an athletes center of gravity shift form one position to another depends on how much of the athletes body mass is moved and how far its moved. |
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| center of gravity in flight |
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Definition
| the flight path of an athletes center of gravity is set at take off. RESULTANT of both horizontal and vertical direction combined. |
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| the force pushing up against the athletes. |
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| is a push or a pull that changes or tends to change the shape or the state of motion of an athlete or an object. |
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| when the direction and amount of the applied force are known, the combination of the two items is called a force vector. vector means a qyantity that has direction. |
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| linear or in a straight line, angular or in a circular or rotary fashion and last general which is a mix of the two. |
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| movement occurs in a straight line. translation is when all parts of the object or athlete move the same distance in the same direction and in the same time frame. |
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| movement has to occur around a an axis. |
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| when an athlete applies force to an object over a certain time. can be applied to self and other athletes. |
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| wen the objects seperate, an one or both moves away from the other. |
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| occurs when an object moves or tends to move while in contact with another object. |
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| exists between the contacting surfaces of two resting objects and provides the resistive fore opposing the intiation of motion |
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| a resistive force that develops when two objects slide and rub against each other |
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| produces a resistive force when objects such as balls and wheels roll over a supporting or contacting surface |
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Definition
| move in rotoray fashion and are used in all sports. a levers is a simple machine that transmits and changes mechanical energy from one place to another. |
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Definition
| an axis about which a lever rotates |
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| the distance from the axis to where the force is applied |
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| the perpendicular distance from the axis to where the resistance applies its own force |
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| levers rotating around an axis |
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| the axis is positioned somewhere in between the force and the resistance. |
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| characterized by having both force and resistance on the same side of the axis, with the force arm always longer then the resistance arm. |
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| the axis is at one end of the lever and the applied force is always closer to the axis then the resistance. |
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| implies coordination and control. |
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| relates to how much resistance athletes put up against having their balance disturbed. |
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| its a collection of fluid forces that tend to oppose the actions an athlete is trying to perform. it pushes pulls and tugs on an athlete. |
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| motion of one object relative to another |
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| is created by the air or water passing over and object |
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