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The units of measurement for force, weight, drag force, lift force, friction force and vertical ground reaction force is the...
newton (N)
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The units of measurement for radius rotation, radius of resistance, and moment arm are...
meters (m)
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The units of measurement for linear speed and projectile speed are...
meters per second (m/s)
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The units of measurement for an angle are...
radians (rad)
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The units of measurement for angular velocity are...
radians per second (rad/s)
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The units of measurement for angular impulse is...
newton-meter-sec (N-m-s)
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The units of measurement for angular momentum is...
kilogram meter squared per second (kg-m2/s)
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The units of measurement for angular inertia is...
kilogram meter squared (kg-m2)
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The units of measurement for torque is...
newton-meter (N-m)
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Forces that influence the movement of a projectile when it is in air
- weight (W)
- drag force (
 ) - lift force ()
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A change in a factor that would increase a projectile's maximum vertical height
projectile speed
projectile angle
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A change in a factor that would increase a projectile's maximum horizontal distance
projectile speed
time in air
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A change in a factor that would increase a projectile's time in the air
projectile speed
relative projection height
projection angle
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A body's total _______ is the result of an optimal combination of individual joint linear speeds.
linear speed (s)
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During a jump, ankle plantar flexion results in an increase in linear speed of...
all joints superior to the ankle
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During a jump, knee extension results in an increase in linear speed of...
all joints superior to the knee
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During a jump, hip extension results in an increase in linear speed of...
all joints superior to the hip
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"The straight-line distance from a joint/body axis of rotation to a point on a body segment" is the definition of...
radius of rotation
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"The speed of joint/body rotation" is the definition of...
angular velocity (ω)
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"Linear Speed - Angular Velocity Principle"
A change in factor that would increase the linear speed of a point on a rotating body
joint angular velocity (ω)
and/or
radius of rotation ( )
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"Angular Impulse - Momentum Principle"
A change in factor that would increase the angular velocity of a body segment
an increase in joint torque ( )
and/or
an increase in application time (t) of the joint torque
and/or
a decrease in the body component's angular inertia (I)
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"Joint Torque Principle"
A change in factor that would increase joint torque
an increase in a muscle force ( )
and/or
an increase in the moment arm ( )
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"Angular Inertia Principle"
A change in factor that would decrease a body segment's angular inertia (i.e., its resistance to angular motion)
a decrease in in the body component's mass (m)
and/or
a decrease in the radius of resistance ( )
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"For any muscle to create its greatest amount of muscle force, an oppositely directed external force of equal magnitude must exist"
the action - reaction principle
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"Whenever your body is in contact with the ground, there are two __________ (one vertical and one horizontal) that can oppose the muscle forces created inside the body."
ground reaction forces
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"________ is the horizontal ground reaction force between the soles of your shoes and the ground."
friction force
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Coefficient of friction is influenced by the following:
hardness/softness
and
smoothness/roughness
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"Friction Force Principle"
A change in a factor that would increase Friction Force
an increase in the coefficient of friction (μ)
and/or
an increase in the vertical ground reaction force( )
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Factors does not affect the magnitude of the friction force generated between the soles of your shoes and the ground
contact area
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Assuming the vertical ground reaction force does not change, the largest amount of friction would be generated by shoe sole materials that are...
soft and rough
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How does pushing downward against the ground during running increase the friction force between the soles of your shoes and the ground?
vertical ground reaction force ( )
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