QUIZZES Flashcards
Convert 95 mph (the speed of a major league fastball) to meters per second
42.56
Anatomy Review: Abduction of the upper extremity takes place in the _________ plane and around the _______ axis.
sagittal . . . anteroposterior
sagittal . . . longitudinal
frontal . . . longitudinal
frontal . . . anteroposterior
frontal . . . anteroposterior
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
speed & velocity
When considering an object, body, or body segment, weight is considered an external force and never an internal force.
True
False
True
Rigid-body mechanics and deformable-body mechanics are the two branches of mechanics we will study most during the semester.
True
False
False
Horizontal abduction and adduction takes place in the horizontal or transverse plane, around the _____________ axis.
Anteroposterior
Transverse
Longitudinal
Dorsal
Longitudinal
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
Aristotle
If 2y = 3x + 24 and x=40 what is y?
27
120
144
72
72
What is the broad, superficial muscle that covers much of the upper back?
Deltoid
Gastrocnemius
Trapezius
Pectoralis minor
Trapezius
Which of the following is NOT a basic dimension?
Length
Weight
Time
Mass
Weight
When velocity changes sign this indicates a change in direction of movement.
True
False
True
Distance and speed are scalar quantities.
True
False
True
Which is NOT one of the basic dimensions we mentioned in class?
Length
Mass
Weight
Time
Weight
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.
0 (zero)
One km is smaller than 1 mile.
True
False
True
The motion of my forearm when I flex at the elbow joint is classified as curvilinear motion.
True
False
False
The motion of a pendulum is an example of:
Rectilinear Motion
Curvilinear Motion
Angular Motion
General Motion
Angular Motion
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
188
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
0.5 m/s2
When falling to earth, a body has a vertical acceleration of -9.8 m/s2.
True
False
True
Linear displacement may be greater than linear distance, but linear distance can never be greater than linear displacement.
True
False
False
Mike Powell’s long jump world record is greater than 25 ft.
True
False
True
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.
Negative
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
All external forces
Units for linear velocity include:
m/s
miles/hr
feet/s
all are appropriate velocity units
all are appropriate velocity units
The unit of measurement for displacement can be m.
True
False
True
Displacement indicates the straight-line distance and direction from an object’s start point to end point.
True
False
True
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
- 0.5 m/s/s
Which of the following units for velocity come from the International System?
m/s
miles/s
feet/s
kg/s
m/s
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.
The proximal segments begin to rotate prior to the distal segments.
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
Distance: 40 degrees, displacement: 20 degrees
One degree is larger than one radian.
Group of answer choices
True
False
False
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
True
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
Greatest when the distance between the axis and point is greatest
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
(radius)*(angular velocity) where radius is the distance from the axis of rotation to the point
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
180 Degrees
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
An absolute angle
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
10 degrees/s
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
False
Even with no angular acceleration, constant angular motion gives rise to a nonzero centripetal acceleration.
Relative angle:
the angle formed between two adjacent body segments
Absolute angle:
the angle formed by a body segment with respect to an absolute reference line, usually either the horizontal or vertical.
