Quiz #12

Question 1

The study of the cause of angular motion

Answer 1

angular kinetics

Question 2

Linear: mass
Angular: _

Answer 2

moment of inertia

Question 3

Linear: force
Angular: _

Answer 3

torque

Question 4

Linear: momentum
Angular: _

Answer 4

angular momentum

Question 5

Linear: Newton’s laws
Angular: _

Answer 5

Newton’s Laws (angular analogs)

Question 6

The resistance of an object to a change in motion

Answer 6

inertia

Question 7

quantified as mass

Answer 7

linear inertia

Question 8

The property of an object that resists changes in angular motion
- quantified as the object’s moment of inertia

Answer 8

angular inertia

Question 9

Ia = ZMiri^2
Units: Kg * m^2

Answer 9

moment of inertia

Question 10

Affected by:
- mass
- how the mass is distributed relative to the axis of rotation

Answer 10

moment of inertia

Question 11

Humans _ their moments of inertia

Answer 11

manipulate

Question 12

When mass is distributed closer to the axis of rotation the moment of inertia is _

Answer 12

smaller

Question 13

Centric forces tend to result in _

Answer 13

linear motion

Question 14

Eccentric (off-centered) forces have a tendency to cause _ and _ forces

Answer 14

linear and rotational

Question 15

• quantification of the rotational effect of an eccentric force
• depends on:
  
  • T = (F x d)
  • Unit: Nm
  • Amount of force
  • Length of moment arm

Answer 15

Torque (moment of force, moment)

Question 16

• segment mass
• External objects
• Muscle
  
  • eccentric to the axis of rotation

Answer 16

potential forces of torque

Question 17

Defined as the turning effect of a force on a body
- when force is applied which causes a rotation

Answer 17

torque/moment of force

Question 18

_ and _ are used interchangeably in literature

Answer 18

moment and torque

Question 19

Two important characteristics

Answer 19

1. magnitude of force
2. shortest of perpendicular distance from the pivot point to the line of action of the force

Question 20

T = F x r

Answer 20

formula for torque

Question 21

The distance between the axis of rotation and the force
- muscle line of action is eccentric to the axis of rotation

Answer 21

moment arm of muscle

Question 22

• Fulcrum
• Effort force, effort arm
• Resistance force, resistance arm

Answer 22

levers

Question 23

Levers are classified according to the _

Answer 23

relative position of the fulcrum, effort force and resistive force