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Biomechanics > QUIZZES > Flashcards

QUIZZES Flashcards

1
Q

Convert 95 mph (the speed of a major league fastball) to meters per second

A

42.56

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2
Q

Anatomy Review: Abduction of the upper extremity takes place in the _________ plane and around the _______ axis.

sagittal . . . anteroposterior
sagittal . . . longitudinal
frontal . . . longitudinal
frontal . . . anteroposterior

A

frontal . . . anteroposterior

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3
Q

Which of the following pairs of quantities are expressed in the same units of measure?

velocity & acceleration
all three previous choices are correct
speed & velocity
step rate & step length

A

speed & velocity

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4
Q

When considering an object, body, or body segment, weight is considered an external force and never an internal force.

True
False

A

True

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5
Q

Rigid-body mechanics and deformable-body mechanics are the two branches of mechanics we will study most during the semester.

True
False

A

False

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6
Q

Horizontal abduction and adduction takes place in the horizontal or transverse plane, around the _____________ axis.

Anteroposterior
Transverse
Longitudinal
Dorsal

A

Longitudinal

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7
Q

The first person to be mentioned in the history of biomechanics, as presented in class was:

Sir Isaac Newton
Dr. Smith’s grandfather
Galileo
Aristotle

A

Aristotle

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8
Q

If 2y = 3x + 24 and x=40 what is y?

27
120
144
72

A

72

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9
Q

What is the broad, superficial muscle that covers much of the upper back?

Deltoid
Gastrocnemius
Trapezius
Pectoralis minor

A

Trapezius

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10
Q

Which of the following is NOT a basic dimension?

Length
Weight
Time
Mass

A

Weight

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11
Q

When velocity changes sign this indicates a change in direction of movement.

True
False

A

True

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12
Q

Distance and speed are scalar quantities.

True
False

A

True

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13
Q

Which is NOT one of the basic dimensions we mentioned in class?

Length
Mass
Weight
Time

A

Weight

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14
Q

At the highest point of a vertical jump, a person’s instantaneous vertical velocity is:

0 (zero)
-9.8 m/s
+9.8 m/s
It is impossible to answer this question with the amount of information provided.

A

0 (zero)

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15
Q

One km is smaller than 1 mile.

True
False

A

True

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16
Q

The motion of my forearm when I flex at the elbow joint is classified as curvilinear motion.

True
False

A

False

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17
Q

The motion of a pendulum is an example of:

Rectilinear Motion
Curvilinear Motion
Angular Motion
General Motion

A

Angular Motion

18
Q

Dr. Heise is 6 feet, 2 inches tall. How tall, in centimeters is he? Round to the nearest integer. There are 2.54 cm in 1 inch.

1.83
1.88
183
188

A

188

19
Q

If a person goes from no movement to 5 m/s over the span of 10 s, what is their average acceleration?

2 m/s2
5 m/s2
0.5 m/s2
0.25 m/s2

A

0.5 m/s2

20
Q

When falling to earth, a body has a vertical acceleration of -9.8 m/s2.

True
False

A

True

21
Q

Linear displacement may be greater than linear distance, but linear distance can never be greater than linear displacement.

True
False

A

False

22
Q

Mike Powell’s long jump world record is greater than 25 ft.

True
False

A

True

23
Q

When slowing down in a positive direction, a person’s acceleration would be:

0 (zero)
Positive
Negative
It is impossible to answer this question with the amount of information provided.

A

Negative

24
Q

A free body diagram is a schematic picture showing _______________ acting on a system to be analyzed.

All internal forces
All external forces
All internal and external forces
All internal and external forces, except weight

A

All external forces

25
Q

Units for linear velocity include:

m/s
miles/hr
feet/s
all are appropriate velocity units

A

all are appropriate velocity units

26
Q

The unit of measurement for displacement can be m.

True
False

A

True

27
Q

Displacement indicates the straight-line distance and direction from an object’s start point to end point.

True
False

A

True

28
Q

What is the acceleration for a cyclist slowing down in a positive direction from 10 m/s to 5 m/s in a period of 10 s?

1.5 m/s/s
- 1.5 m/s/s
0.5 m/s/s
- 0.5 m/s/s

A
  • 0.5 m/s/s
29
Q

Which of the following units for velocity come from the International System?

m/s
miles/s
feet/s
kg/s

A

m/s

30
Q

The motion of the arm during a properly executed throwing motion is such that:
Group of answer choices

The distal segments begin to rotate prior to the proximal segments.

The proximal segments begin to rotate prior to the distal segments.

All segments begin to rotate at the same time.

The order of segment rotation is irrelevant.

A

The proximal segments begin to rotate prior to the distal segments.

31
Q

If a pendulum swings forward 30 degrees and then back 10 degrees, the angular distance and displacement are:

Distance: 40 degrees, displacement: 40 degrees

Distance: 40 degreees, displacement: 30 degrees

Distance: 30 degrees, displacement: 20 degrees

Distance: 40 degrees, displacement: 20 degrees

A

Distance: 40 degrees, displacement: 20 degrees

32
Q

One degree is larger than one radian.
Group of answer choices

True

False

A

False

33
Q

If a body segment is rotating with a constant angular velocity, the angular acceleration of the segment AND the linear, tangential acceleration of a point on the distal end of the segment are zero.

True

False

A

True

34
Q

With a constant, non-zero angular velocity, the tangential linear velocity of a rotating point about the axis is:
Group of answer choices

Greatest when the distance between the axis and point is smallest

Greatest when the distance between the axis and point is greatest

The same no matter the distance between the axis and point

0

A

Greatest when the distance between the axis and point is greatest

35
Q

The linear velocity of a point on a body undergoing angular motion is equal to:
Group of answer choices

(radius)*(arclength) where radius is the distance from the axis of rotation to the point

(radius)*(angular acceleration) where radius is the distance from the axis of rotation to the point

(radius)*(liner displacement) where radius is the distance from the axis of rotation to the point

(radius)*(angular velocity) where radius is the distance from the axis of rotation to the point

A

(radius)*(angular velocity) where radius is the distance from the axis of rotation to the point

36
Q

What is the knee joint angle when the body is in the anatomical position?
Group of answer choices

0 degrees

90 degrees

180 degrees

270 degrees

A

180 Degrees

37
Q

An angle calculated between the thigh and a horizontal plane is:
Group of answer choices

A relative angle

An absolute angle

A joint angle

An inferior angle

A

An absolute angle

38
Q

When a pendulum starts from rest and swings 20 degrees in 2 seconds, the average angular velocity is:
Group of answer choices

0

10 degrees/s

20 degrees/s

not enough information to answer

A

10 degrees/s

39
Q

If a body is rotating with a constant angular velocity, the angular acceleration AND the linear, centripetal acceleration of the body are zero.
Group of answer choices

True

False

A

False

Even with no angular acceleration, constant angular motion gives rise to a nonzero centripetal acceleration.

40
Q

Relative angle:

A

the angle formed between two adjacent body segments

41
Q

Absolute angle:

A

the angle formed by a body segment with respect to an absolute reference line, usually either the horizontal or vertical.

Biomechanics (7 decks)

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