# Biomechanics Quiz Questions set 2.txt

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 Author: Anonymous ID: 235758 Filename: Biomechanics Quiz Questions set 2.txt Updated: 2013-09-19 01:35:00 Tags: MOTHAFUCKA Folders: Description: LEARNDISSHITHOE Show Answers:

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1. The units of measurement for force (which include 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...
5. The units of measurement for angular velocity are...
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 are...
newton-meters (N-m)
10. Which of the following is/are force(s) that influence the movement of a projectile when it is in air?
• weight (W)
• drag force ()
• lift force ()
11. Which of the following describe "a change in a factor" that would increase a projectile's maximum vertical height?
• projectile speed
• projectile angle
12. Which of the following describe "a change in a factor" that would increase a projectile's maximum horizontal distance?
• projectile speed
• time in air
13. Which of the following describe "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 the following joints
all joints superior to the ankle
16. During a jump, knee extension results in an increase in linear speed of the following joints
all joints superior to the knee
17. During a jump, hip extension results in an increase in linear speed of the following joints
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...
19. "The speed of joint/body rotation" is the definition of...
angular velocity (ω)
20. Based on the "Linear Speed - Angular Velocity Principle" which of the following describes "a change in factor" that would increase the linear speed of a point on a rotating body?
joint angular velocity (ω)

and/or

(JAVROR)
21. Based on the "Angular Impulse - Momentum Principle" which of the following describes "a change in factor" that would increase the angular velocity of a body segment?
an increase in joint torque () applied to the body component

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. Based on the "Joint Torque Principle" which of the following describes "a change in factor" that would increase joint torque?
• an increase in a muscle force
• () pulling on the bones that are held together at the joint

and/or

an increase in the moment arm ()
23. Based on the "Angular Intertia Principle" which if the following describe "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" is an interpretation of...
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. The coefficient of friction is a number that represents the material properties of the soles of your shoes that influence friction force. The coefficient of friction is influenced by the following:
hardness/softness

and

smoothness/roughness
28. Based on the "Friction Force Principle" which of the following describes "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. Which of the following 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 ()

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