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biomech > FA: Kinematics & Kinetics > Flashcards

FA: Kinematics & Kinetics Flashcards

1
Q

In a closed packed position, the articulating surfaces are maximally congruent. The structures around the joint are tensed

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Both statements are True

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2
Q

You are standing on your right leg. What type of level system occurs at the pelvis?

Type 1
Type 2
Type 3

A

Type 1

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3
Q

During the extreme enhanced community quarantine, you decided to do 50 push ups per day to keep your body fit. The type of kinematic chain happening at the upper extremity is ______.

A

Closed Kinematic Chain

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4
Q

1 radian = ______

A

57.3

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5
Q

Following the concave-convex rule, the femoral head goes into what direction during hip abduction?

A

Inferior

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6
Q

All points travel in the same distance, direction and velocity at the same time, occurs along or parallel to an axis

A

Translatory

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7
Q

Almost all motions of the major joints in the body occurs in a circle around an axis. Gliding of the carpal bones is an example.

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Only the first statement is True

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8
Q

Moment arm is farthest at midrange for most of the muscles. Torque increases with greater moment arm

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Both statements are True

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9
Q

To say that that the body is at its Mechanical Advantage, the resistance arm should be greater than the effort. The body is built for force application.

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Both statements are False

Mechanical Advantage = Mechanical Disadvantage

Force application = Speed

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10
Q

What is the importance of segmental COG of body parts?

  • Provide an estimate at which force is concentrated in a segment
  • To estimate the torque
  • Both A and B
  • Neither A nor B
A

Both A and B

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11
Q

In preparation for ball kicking, a soccer player flexes the knee joint. The distance from the ankle to knee joint axis in 12 inches. Compute for the angular velocity of the leg when the limb moves in 0.8 secs when knee joint angle is at 70 deg of flexion

A

1.53 rad

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12
Q

Effort when elbow is flexed to 90 deg carrying 3 lbs dumbbells

A

Biceps brachii at its insertion

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13
Q

Point at which the body’s weight is equally balanced

A

Center of mass and center of gravity

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14
Q

A construction worker squats to lift a sack of cement from the floor. Determine the type of kinematic chain.

A

Closed Kinematic Chain

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15
Q

Type of Lever system: Kicking the ball in sitting position

Type 1
Type 2
Type 3

A

Type 3

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16
Q

Deals with types of motion or movement without regard for the forces that produce that motion

A

kinematics

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17
Q

Reaction forces arise from the push of one object on another

A

contact force

18
Q

In preparation for ball kicking, a soccer player flexes the knee joint. The distance from the ankle to knee joint axis in 12 inches. Compute for the linear velocity of the foot when the limb moves in 0.8 secs when knee joint angle is at 70 deg of flexion?

A

18.33 in/sec

19
Q

Physiological or normal body movement occurs at what region of the stress Ð strain curve?

A

Toe region

20
Q

Type of Lever System: In side-lying position, you abducted your right leg (movement away from the midline).

Type 1
Type 2
Type 3

A

Type 3

21
Q

Most common Lever Class system in the human body

A

Type 3

22
Q

You are standing on your right leg, where is the fulcrum?

A

Knee joint

23
Q

Muscle fibers with greater length, has the same level of strength compared to a shorter muscle fiber. These types of muscle fibers tend to deform more.

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Both statements are True

24
Q

Refers to the accessory motion during joint movement

A

Arthrokinematics

25
Q

Viscosity increases with ______?

A

Higher pressure

26
Q

Simplified drawings of the body with force vectors acting on a segment

A

Free Body diagram

27
Q

Force that has an action line parallel / tangential to contacting surfaces that creates or limits movement between surfaces

A

Shear Force

28
Q

What is the significance of Free Body Diagrams?

  • Simplified representation of forces
  • gives us an idea as to the line of pull of muscles
  • guide for determining the body’s lever system
  • all of the above
A

all of the above

29
Q

In preparation for ball kicking, a soccer player flexes the knee joint. The distance from the ankle to knee joint axis in 12 inches. Compute for the linear distance travelled by the ankle from a fully extended position to 70 deg of flexion

1.22 in
1.91 in
14.66 in
22.92 in

A

14.66 in

30
Q

The greater the number of muscle fibers, the less stiff is the muscle. However, elongation failure remains the same.

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

wrong: Only the second statement is True

31
Q

Type of Lever system: Heel Raises

Type 1
Type 2
Type 3

A

wrong: type 1

32
Q

In preparation for ball kicking, a soccer player flexes the knee joint. The distance from the ankle to knee joint axis in 12 inches. Determine the formula to use, to compute for the linear distance from an extended knee to 70 deg of knee flexion

d = r(rad)
d = rad/angle
d = rad/12 in
none. of the above

A

d = r(rad)

33
Q

In the stress-strain curve, microfailure begins at

toe region
elastic region
plastic region
point of failure

A

plastic region

34
Q

When creating a free body diagram, the shaft and arrowhead follows the orientation of the muscle. The length of the line traces the attachment of the muscle

  • Both statements are True
  • Both statements are False
  • Only the first statement is True
  • Only the second statement is True
A

Only the first statement is true

35
Q

Using your knowledge of kinetics, which is the easiest position when doing push ups?

wall push ups
modified push ups (on your knees)
normal push ups (on your toes)

A

wrong: wall push ups

36
Q

During pushups, in the up phase, what type of contraction is happening on elbow extensors?

concentric
isometric
eccentric

A

wrong: concentric

37
Q

A semiconductor worker reaches for an electronic part in the conveyor belt for inspection. Determine the type of kinematic chain.

A

open kinematic chain

38
Q

Your are standing your right leg, you can be more stable if you carry a bag on which side?

left side
right side
any side
cannot be determined

A

wrong: left side

39
Q

Your are standing your right leg, where is effort?

  • muscles on the anterior thigh at its insertion
  • muscles on the posterior thigh at its insertion
  • gluteal muscles at its insertion
  • abdominal muscles at its insertion
A

wrong: muscles on the posterior thigh at its insertion

40
Q

Following the convex, concave rule, the humeral head goes into what direction during shoulder flexion

anterior
posterior
superior
inferior

A

wrong: anterior; posterior ata?

biomech (6 decks)

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