Deck 11: Angular Kinematics of Human Movement

Question 1

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

Answer 1

both 2π radians and 360° and 270° and 3/4 revolution

Question 2

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

Answer 2

linear and angular velocity

Question 3

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

Answer 3

gradients

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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.

Question 12

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

Question 13

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 correct

Question 14

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

Question 15

Which angular direction is conventionally regarded as positive?

A)clockwise
B)counterclockwise
C)flexion
D)extension

Question 16

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

Question 17

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

Question 18

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

Question 19

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

Question 20

What quantity will have the following units: rad/s?

A)linear displacement
B)angular displacement
C)linear velocity
D)angular velocity

Question 21

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

Question 22

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.

Question 23

Choose the term that describes the rate of change in angular position.

A)angular kinetics
B)angular velocity
C)degree
D)instant center

Question 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

Question 25

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

Question 26

The clockwise direction in rotational motions is also considered a ________ direction.

Question 27

Choose the term that describes the rate of change in angular velocity.

A)angular acceleration
B)angular displacement
C)angular kinematics
D)angular kinetics

Question 28

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

Question 29

Choose the term that describes the change in the angular position.

A)angular acceleration.
B)angular displacement
C)angular kinematics
D)angular kinetics

Question 30

The most common unit of time is second.

Question 31

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

Question 32

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

Question 33

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

Question 34

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

Question 35

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

Question 36

A ________ is a unit of angular measurement equal to approximately 57.3°.

Question 37

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

Question 38

Once a thrown ball is released,the tangential and radial acceleration become zero.

Question 39

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