# Quiz 11: Angular Kinematics of Human Movement

Physics & Astronomy

Q 1Q 1

If angular acceleration is constant,then angular velocity must be
A)constant.
B)increasing or decreasing.
C)equal to zero.
D)none of these answers is correct.

Free

Multiple Choice

B

Q 2Q 2

The component of angular acceleration directed toward the center of curvature defines what?
A)radial acceleration
B)tangential acceleration
C)angular acceleration
D)linear acceleration

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Multiple Choice

A

Q 3Q 3

What quantity will have the following units: rad/s?
A)linear displacement
B)angular displacement
C)linear velocity
D)angular velocity

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Multiple Choice

D

Q 4Q 4

Which of the following terms describes the location of the center of rotation at a joint at a given instant in time?
A)precise center
B)exact center
C)instant center
D)none of these answers is correct

Free

Multiple Choice

Q 5Q 5

Which angular direction is conventionally regarded as positive?
A)clockwise
B)counterclockwise
C)flexion
D)extension

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Multiple Choice

Q 6Q 6

Which of the following is/are true regarding a radian?
A)it is equal to 57.3 degrees
B)it is the size of the angle subtended by an arc of radius length
C)it is a unit of angular displacement
D)all of these answers are correct

Free

Multiple Choice

Q 7Q 7

Which of the following expressions defines angular velocity?
A)change in angular position over a given time
B)angular displacement divided by time
C)both change in angular position over a given time and angular displacement divided by time
D)neither change in angular position over a given time nor angular displacement divided by time

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Multiple Choice

Q 8Q 8

Which of the following is not a valid unit of angular velocity?
A)radians per second
B)revolutions per minute
C)degrees per hour
D)gradients

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Multiple Choice

Q 9Q 9

Which of the following are scalar quantities?
A)angular distance
B)angular velocity
C)both angular distance and angular velocity
D)neither angular distance nor angular velocity

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Multiple Choice

Q 10Q 10

Which of the following quantities are equal?
A)2π radians and 360°
B)270° and 3/4 revolution
C)both 2π radians and 360° and 270° and 3/4 revolution
D)none of these answers is correct

Free

Multiple Choice

Q 11Q 11

If the knee joint goes through 100° of flexion during the down phase of a squat,what is the total angular distance during 10 complete squats?
A)1000°
B)2000°
C)0°
D)none of these answers is correct

Free

Multiple Choice

Q 12Q 12

Which of the following is a correct formula for angular velocity?
A)σ = f/t
B)w = f/t
C)w = q/t
D)σ = q/t

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Multiple Choice

Q 13Q 13

Which of the following is/are correct units for angular speed?
A)rpm
B)deg/s
C)rad/s
D)both rpm and deg/s
E)all of these answers are correct

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Multiple Choice

Q 14Q 14

A procedure for identifying the direction of an angular motion vector is called what?
A)right hand rule
B)clockwise rule
C)both right hand rule and clockwise rule
D)no special procedure is needed

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Multiple Choice

Q 15Q 15

What does the letter "r" stand for in the equation v = rw?
A)resultant
B)radius of rotation
C)radian
D)none of these answers is correct

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Multiple Choice

Q 16Q 16

What rules have to be followed when using the formula v = rw?
A)units for w have to be radian-based
B)units for v and r must the same base units (with time included in "v")
C)both units for w have to be radian-based and units for v and r must the same base units (with time included in "v")
D)there are no special rules

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Multiple Choice

Q 17Q 17

The formula v = rw establishes the relationship between what?
A)linear and angular displacement
B)linear and angular velocity
C)linear displacement and linear velocity
D)angular displacement and angular velocity

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Multiple Choice

Q 18Q 18

Which of the following is/are formula(s)for tangential acceleration?
A)a

_{t}= (v_{t}- v_{t})/t B)a_{t}= ra C)both a_{t}= (v_{t}- v_{t})/t and a_{t}= ra D)none of these answers is correctFree

Multiple Choice

Q 19Q 19

What component of angular acceleration represents the rate of change in direction of a rotation body?
A)tangential acceleration
B)radial acceleration
C)linear acceleration
D)none of these answers is correct

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Multiple Choice

Q 20Q 20

When are radian-based units essential?
A)when measuring linear velocity
B)when measuring angular velocity
C)when converting between linear and angular velocity
D)all of these answers are correct

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Multiple Choice

Q 21Q 21

Which of the following can contribute to the resultant linear velocity of a projectile at release?
A)tangential acceleration
B)radial acceleration
C)both tangential acceleration and radial acceleration
D)none of these answers is correct

Free

Multiple Choice

Q 22Q 22

Radial acceleration is directly affected by which of the following?
A)tangential velocity
B)radius of rotation
C)both tangential velocity and radius of rotation
D)none of these answers is correct

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Multiple Choice

Q 23Q 23

The component of angular acceleration defined as the change in linear velocity for a body traveling on a curved path is what?
A)tangential acceleration
B)radial acceleration
C)angular acceleration
D)linear acceleration

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Multiple Choice

Q 24Q 24

Choose the term that describes "the precisely located center of rotation at a joint at a given instant of time."
A)radial acceleration
B)instant center
C)radius of rotation
D)tangential acceleration

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Multiple Choice

Q 25Q 25

Choose the term that describes the change in the angular position.
A)angular acceleration.
B)angular displacement
C)angular kinematics
D)angular kinetics

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Multiple Choice

Q 26Q 26

Choose the term that describes the unit of angular measure used in angular-linear kinematic quantity conversions.
A)radial acceleration
B)radian
C)radius of rotation
D)right hand rule

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Multiple Choice

Q 27Q 27

Choose the term that describes the rate of change in angular position.
A)angular kinetics
B)angular velocity
C)degree
D)instant center

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Multiple Choice

Q 28Q 28

Choose the term that describes the rate of change in angular velocity.
A)angular acceleration
B)angular displacement
C)angular kinematics
D)angular kinetics

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Multiple Choice

Q 29Q 29

Choose the term that describes the procedure for identifying the direction of an angular motion vector.
A)radial acceleration
B)radius of rotation
C)right hand rule
D)tangential acceleration

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Multiple Choice

Q 30Q 30

Choose the term that describes the distance from the axis of rotation to a point of interest on a rotating body.
A)radial acceleration
B)radian
C)radius of rotation
D)right hand rule

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Multiple Choice

Q 31Q 31

Choose the term that describes the component of angular acceleration of a rotating body directed toward the center of curvature.
A)radial acceleration
B)radian
C)radius of rotation
D)right hand rule

Free

Multiple Choice

Free

Short Answer

Free

Short Answer

Q 34Q 34

A ________ is a simple tool commonly used by clinicians to measure joint angles on human patients.

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Short Answer

Q 35Q 35

The symbols for linear kinematic quantities are English letters,whereas the symbols for angular kinematic quantities are ________ letters.

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Short Answer

Q 36Q 36

When solving problems related to linear/angular conversion,the units for angular displacement must be in revolutions.

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True False

Q 37Q 37

If flexion of a joint is positive in direction when viewed from one side,the same motion will be negative in direction when viewed from the opposite side.

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True False

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True False

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True False