# Biomechanics Quiz Questions set 2.txt

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1. The units of measurement for force, weight, drag force, lift force, friction force and vertical ground reaction force is the...
newton (N)
2. The units of measurement for radius rotation, radius of resistance, and moment arm are...
meters (m)
3. The units of measurement for linear speed and projectile speed are...
meters per second (m/s)
4. The units of measurement for an angle are...
radians (rad)
5. The units of measurement for angular velocity are...
radians per second (rad/s)
6. The units of measurement for angular impulse is...
newton-meter-sec (N-m-s)
7. The units of measurement for angular momentum is...
kilogram meter squared per second (kg-m2/s)
8. The units of measurement for angular inertia is...
kilogram meter squared (kg-m2)
9. The units of measurement for torque is...
newton-meter (N-m)
10. Forces that influence the movement of a projectile when it is in air
• weight (W)
• drag force ()
• lift force ()
11. A change in a factor that would increase a projectile's maximum vertical height
projectile speed

projectile angle
12. A change in a factor that would increase a projectile's maximum horizontal distance
projectile speed

time in air
13. A change in a factor that would increase a projectile's time in the air
projectile speed

relative projection height

projection angle
14. A body's total _______ is the result of an optimal combination of individual joint linear speeds.
linear speed (s)
15. During a jump, ankle plantar flexion results in an increase in linear speed of...
all joints superior to the ankle
16. During a jump, knee extension results in an increase in linear speed of...
all joints superior to the knee
17. During a jump, hip extension results in an increase in linear speed of...
all joints superior to the hip
18. "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
19. "The speed of joint/body rotation" is the definition of...
angular velocity (ω)
20. "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 ()
21. "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)
22. "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 ()
23. "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 ()
24. "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
25. "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
26. "________ is the horizontal ground reaction force between the soles of your shoes and the ground."
friction force
27. Coefficient of friction is influenced by the following:
hardness/softness

and

smoothness/roughness
28. "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()
29. Factors does not affect the magnitude of the friction force generated between the soles of your shoes and the ground
contact area
30. 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
31. 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 ()
 Author: Anonymous ID: 244862 Card Set: Biomechanics Quiz Questions set 2.txt Updated: 2013-11-04 07:34:27 Tags: HI SIMONE Folders: Description: HI SIMONE Show Answers: