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Chapter 9 & 10
2nd class lever system:
Internal forces...
Chapter 9 & 10
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1
Internal forces...
forces acting btwn components w/in the system
objects travel along path, object moved in same distance in same direction
forces acting on a system outside
a combination of linear and angular motions
2
2nd class lever system:
ARM/MRA
MRA/ARM
RMA/AMR
none of the above
3
A stage that begins when the task is first introduced. What particular skill involves/looks like & goals.
autonomous/application stage
feedback
associative/stablization stage
cognitive/acquisition stage
4
Mass...
quantity of matter in a physical body
object's resistance to change in angular motion
the avergae location of the object's mass
object's resistance to change in linear motion
5
Basic movements that are foundational for other more complex sport-specific skills
body management skills
locomotor skills
fundamental movement skills
object control skills
6
A technique of taking advantage of the region of air shielded by another person
biking
dragging
lifting
drafting
7
Lift force is created when the object "turns" or "shift" the fluid flow.
True
False
8
subjective & systemative evaluation based on one's extensive experience w/out measuring & using numbers
quantitative analysis
qualitative analysis
9
2nd class lever system:
two forces applied on opposite sides of fulcrum
resistive force is closer to axis than motive force
motive is closer to axis than resistive
all of the above
10
Caused by the friction between the object and the fluid.
pressure drag
surface drag
11
Drag force decreases as the square of the object's speed relative to the fluid.
True
False
12
Learning to perfom specific movements to perform a certain task.
fundamental movement skills
motor skill acquisition
locomotor skills
body management skills
13
1st class lever:
none of the above
MAR/RAM
ARM/MRA
AMR/RMA
14
Knee extension is an example of the 3rd class lever system.
True
False
15
Feedback given only when performance is outside a given error range.
faded feedback
bandwidth feedback
summary feedback
transfer
16
Witholding feedback from subjects until the last trial in a block is completed.
bandwidth feedback
summary feedback
faded feedback
transfer
17
Transporting the body fro point A to B.
locomotor skills
fundamental movement skills
body management skills
object control skills
18
Stability
all of the above
measure of how easy/difficult balance is disturbed
maintenance of static balance is needed in some sports/skills
most sports dependent on ability to move in & out of static balance
19
Upward force that acts on any objects that are placed in a fluid.
buoyant force
fluid force
kinetic force
dynamic force
20
Pressure (profile) drag:
caused by friction between the object and the fluid
caused by collision of the object with the air
21
3rd class lever system:
all of the above
motive is closer to axis than resistive, AMR/RMA
resistive force is closer to axis than motive force
two forces applied on opposite sides of the fulcrum
22
Force
force applied to the lever with an effort to roate the lever
rotation effect produced by the force
force that must be overcome to rotate the lever
any push/pull apllied to object that can change state of motion/deformation
23
Further the force is from the axis, the greater the torque is produced.
False
True
24
Biomechanics...
none of the above
examines only external forces acting on human body & effects produced
examines only internal forces acting on human body & effects produced
examines internal/external forces acting on human body & effects produced
25
In reality, qualified individuals are very often assigned to teach physical activity that enhances movement skills.
True
False
26
Resistive force...
force applied to the lever with an effort to rotate the lever
force that must be overcome to rotate the lever
27
Angular motion...
all points on object moved the same distance in same direction at same time
a combination of linear and angular motions
all of the above
all points on an object moves in circles about the axis
28
Area defined by the points of contact between body and surface.
stability
balance
line of gravity
base of support
29
Lift force is a component that acts perpendicularly to the flow of fluid that passes the object (up, down, right, left)
True
False
30
Correction of erros using verbal or visual feedback.
evaluation
error correction
observation
preparation
31
Percise feedback is perferred more than general encouragement
False
True
32
Equation of weight...
weight = g/mass
weight = mass + g
weight = mass/g
weight = mass x g
33
Force that acts on objects that are moving relative to the fluid.
fluid force
kinetic force
dynamic fluid force
buoyant force
34
Spin of ball creates difference in pressure between sides, causing trajectory of object to curve
stability
magna effect
balance
magnus effect
35
Motive force...
force that must be overcome to rotate the lever
force applied to the lever with an effort to rotate the lever
36
Safe, appropriate, and well maintained equipment is important for effective learning.
True
False
37
Involves controlling the line of gravity so that it can come back over the base of support.
dynamic balance
balance
static balance
stability
38
Elbow flexion by the brachioradialis is an example of the 2nd class lever system.
False
True
39
Lever arm is the distance between the axis & where the force is applied to on the object.
False
True
40
Feedback given at first after every trial, and then less frequency.
summary feedback
bandwidth feedback
transfer
faded feedback
41
When the sum of all force acting on the object is NOT 0.
law of gravity
law of inertia
law of reaction
law of acceleration
42
Analyzing the characteristics of the movement using numbers, intended for researchers using advanced tech.
quantitative analysis
qualitative analysis
43
Providing feedback continuously for a long period of time will not lead to dependency
True
False
44
The longer the lever arm of the motive force:
none of the above
yellow & red
the less force is needed to produce the torque
the greater torque is produced by the force
45
A stage focused on performing & refining the skill by organizing more appropriate movement patterns.
associative/stabilization stage
cognitive/acquisition
autnomous/application stage
feedback
46
External forces...
all points in an object moves in circles about the axis
forces acting btwn components within the system
forces acting on a system from outside
a combination of linear and angular motions
47
Qualitative analysis is usually done by coaches & teachers using sight, hearing, and immediate feedback
False
True
48
Controlling implements and objects with a part of the body.
body management skills
object control skills
fundamental movement skills
locomotor skills
49
Compare athletes' skill to what is "ideal". Identify areas of improvement.
observation
preparation
evaluation
error correction
50
Kinetics...
description of movement w/out referencing forces that causes motion
a study of force and its effects on the object's motion
forces acting on a system from outside
forces acting btwn components w/in system
51
Understanding of skill objectives, dividing skill into phases, identifying key movements for each phase
error correction
preparation
observation
evaluation
52
The ability of the learner to adapt the newly learnt skill to a different situation.
transfer
faded feedback
summary feedback
bandwidth feedback
53
Component that acts along the flow of the fluid that passes the object.
lift force
drag force
54
Torque...
rotation effect produced by the force
force applied to the lever with an effort to roate the lever
any push/pull apllied to object that can change state of motion/deformation
force that must be overcome to rotate the lever
55
Balancing the body at rest and in motion.
locomotor skills
fundamental movement skills
body management skills
object control skills
56
1st class lever system:
motive force is closer to axis than resistive force
two forces are applied on the opposite sides of the fulcrum
none of the above
resistive force is closer to axis thsn motive force
57
Linear motion...
quantity of matter in a physical body
all points on object moved the same distance in same direction at same time
a combination of linear and angular motions
all points on an object moves in circles about the axis
58
Gravitational acceleration does not depend on where you are.
True
False
59
Which is a factor that affects the motor skill acquisition?
all of the above
equipment
learning time
starting at a young age
60
Rolling, climbing, standing are ______ skills that should be learned at an early age.
none of the above
fundamental
locomotor
object control
61
Info provided to the learner by somebody else following a performance outcome.
intrinsic feedback
knowledge of performance
extrinsic feedback
knowledge of results
62
beforehand that identifies what to observe, where to observe, & how to observe the skill.
preparation
observation
evaluation
error correction
63
Motion of inertia...
object's resistance to change in linear motion
object's resistance to change in angular motion
attraction between all matter
gravity acting on the object
64
Kinematics...
study of description of movement w/out referencing forces that cause motion
study of description of movement with referencing forces that causes motion
study of description of motion w/out referencing forces that cause motion
description of movement w/out referencing forces that dont cause motion
65
Force exerted on object by fluid as object is placed in fluid/moving relative to the fluid.
fluid force
dynamic force
kinetic force
buoyant force
66
Paired forces are equal in magnitude & opposite in direction.
False
True
67
A stage where movements have become almost automatic and proficient. Improved muscle memory.
associative/stabilization stage
none of the above
cognitive/acquisition stage
autonomous/application stage
68
Information about the degree of sucess.
extrinsic feedback
knowledge of performance
knowledge of results
intrinsic feedback
69
To every action there is always an opposite and equal paired reaction force.
law of gravity
law of inertia
law of acceleration
law of reaction
70
General motion
a combination of linear and angular motions
all points on object moved the same distance in same direction at same time
all points on an object moves in circles about the axis
none of the above
71
Neck extension is an example of the 2nd class lever system
False
True
72
Center of mass...
avergae location of the object's mass
quantity of matter in a physical body
object's resistance to change in angular motion
object's resistance to change in linear motion
73
Object at rest will remain at rest. Object in motion will remain in motion.
law of acceleration
none of the above
law of reaction
law of inertia
74
Law of inertia
anything that can flow and change shape quickly
to every action there is always an opposite & equal paired reaction force
when the sum of all forces acting on the object is 0
when the sum of all force is acting on the object is NOT 0
75
Inertia...
object's resistance to change angular motion
object's resistance to change in linear motion
gravity acting on thr object
attraction between all matter
76
The 2nd class lever is common in our body.
False
True
77
Information about the execution of a completed movement.
extrinsic feedback
intrinsic feedback
knowledge of performance
knowledge of results
78
Info provided as a natural consequence of performing an action.
intrinsic feedback
knowledge of performance
knowledge of results
extrinsic feedback
79
Kinematics focuses on time, displacement, velocity, and acceleration.
False
True
80
Imaginary vertical line that passes through the center of mass
line of gravity
base of support
balance
stability
81
Torque is the force that does go through the center of object's mass/ axis of rotation.
True
False
82
Involves maintaining the line of gravity over the base of support.
dynamic balance
stability
static balance
balance
