Term
| *also known as substance, or matter. |
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Definition
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Term
| *the attractive force between two objects that have mass |
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Definition
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Term
| *represents the earth's gravity pulling on the body. |
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Term
| *resistance to change is known as? The more massive, the more resistance to change. |
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Term
| massive athletes tend to have a xxx strength to weight ration than do *smaller, less massive athletes; so they have tougher time stopping, starting, and changing direction. |
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Term
| *T/F it is possible for athletes to reduce their rate of acceleration and still increase speed? |
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Definition
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Term
| *the 2 terms used to define when an athlete or an object speeds up or slows down at a regular rate. |
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Definition
uniform acceleration
uniform deceleration |
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Term
| *known as both speed and direction |
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Definition
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Term
the study of forces and their effects on
living systems |
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Definition
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Term
| the science concerned with the effects of forces acting on objects |
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Definition
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Term
| objects are assumed to be perfectly rigid (segments of human body assumed to be rigid bodies linked together at joints) |
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Definition
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Term
| Rigid body mechanics is subdivided into |
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Definition
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Term
Rigid body mechanics:
the mechanics of objects at rest or moving at constant velocity |
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Definition
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Term
Rigid body mechanics:
the mechanics of objects in
accelerated motion |
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Definition
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Term
| Dynamics is further subdivided into |
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Definition
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Term
Dynamics is further subdivided:
deals with the description of motion |
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Definition
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Term
Dynamics is further subdivided:
deals with the forces that cause
or tend to cause changes in motion |
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Definition
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Term
- substance or matter
- is the measure of inertia |
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Definition
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Term
- the property of an object to
resist changes in motion |
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Definition
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Term
- the measure of the force of
gravity acting on an object |
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Definition
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Term
| Newton’s First Law of Motion? |
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Definition
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Term
Object at rest stays at rest –
Object in motion stays in motion (unless acted upon by a force)
maintain current motion …
continue at same speed in same direction (i.e., maintain a constant velocity) |
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Definition
Newton’s First Law of Motion
~ The Law of Inertia |
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Term
| Newton’s Second Law of Motion |
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Definition
| ~ The Law of Acceleration |
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Term
F = MA
Forces cause acceleration. Acceleration is the effect of forces.
Any time an object starts, stops, slows down, or changes direction, it is accelerating and a net external force is acting to cause this to happen.
(when the net force acting on an object is zero, its acceleration is also zero) |
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Definition
Newton’s Second Law of Motion
~ The Law of Acceleration |
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Term
| Newton’s Third Law of Motion |
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Definition
| ~ The Law of Action-Reaction |
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Term
To every action there is an equal and opposite reaction.
(forces come in mirrored pairs…) |
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Definition
Newton’s Third Law of Motion
~ The Law of Action-Reaction |
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Term
– the branch of dynamics
concerned with the description of motion |
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Definition
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Term
| movement occurs in a straight line |
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Definition
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Term
– rotary motion or rotation
movement occurs around the axis
the body moves in circles about a fixed axis or central line … |
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Definition
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Term
| a combination of linear and angular motions |
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Definition
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Term
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Definition
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Term
| - when something slows down, speeds up, starts, stops, or changes direction (… the rate of change in velocity) – |
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Definition
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Term
| When an athlete speeds up or slows down at a regular rate (ex the increasing speed of a bLiobsled). |
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Definition
| Uniform Acceleration/Decceleration |
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Term
- the rate of motion in a
specific direction
(speed & direction) |
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Definition
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Term
| - the force of attraction |
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Definition
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Term
- the rate of change in velocity caused
by the force of gravity …
~ 9.81 m/s2 (32 ft/s2) |
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Definition
| Gravitational Acceleration |
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Term
- energy due to the vertical position
and mass of an object … |
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Definition
| Gravitational Potential Energy – |
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Term
- the pt in a body (or object) where the mass and weight are balanced in all
directions (gravitational forces are centralized) |
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Definition
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Term
mass/volume
the amt of substance contained in a particular space… |
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Definition
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Term
| Living beings can shift their ? from one position to another, and training teaches athletes to position their ? in certain ways so that they can produce an optimal performance. |
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Definition
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Term
Gravity and Flight:
- force applied in ? and
? direction … the combined effect
or “resultant” sets the takeoff trajectory |
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Definition
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Term
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Definition
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Term
| ? comes in pairs (action-reaction) |
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Definition
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Term
| To find the outcome of several forces acting on a single object, you would need to know what 3? |
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Definition
Magnitude
Point of application
Line of action |
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Term
- the equal and opposite force exerted
in reaction to a force exerted against the earth (see Fig. 2.10) |
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Definition
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Term
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Definition
| Stride Length x Stride Frequency |
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Term
| As ? increases, ground impact forces and the rate of loading increase……this exposes runners to a greater risk of injury. |
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Definition
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Term
| Fast runners must be quite strong and explosive……they need to respond to ? and produce ? (high RFD). |
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Definition
rapid loading of impact
peak force rapidly |
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Term
a force that acts in opposition to the
movement of one surface on another |
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Definition
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Term
when the direction and amount
of applied force are known |
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Definition
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Term
| quantity that has direction |
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Definition
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Term
Projectiles
Athlete must manipulate, control,or assess flight path that occurs.
*which four? |
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Definition
- trajectory
- angle of release
- speed of release
- height of release |
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Term
Projectiles:
- horizontal & vertical force
- gravity
- air resistance |
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Definition
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Term
| ? & ? change flight path to familiar curved flight path |
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Definition
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Term
Projectiles:
- straight up and down
- angle > 45 degrees (ht over dist)
- angle < 45 degrees (dist over ht) |
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Definition
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Term
Projectiles
- faster straight up = higher
- at angles = more distance |
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Definition
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Term
Projectiles:
- ? relative to landing surface
- allocation of forces between
vertical and horizontal vary
- velocity, ht, and angle of takeoff
(release) are all interrelated |
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Definition
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