E3: Angular Motion

Question 1

what are the two fundamental components for anything to rotate

Answer 1

axis of rotation, lever attached to reference point

Question 2

the effect of the rotation is often measured from the objects

Answer 2

center of gravity

Question 3

planes of motion and axis of rotation ___ share the same relationship but do share the same name

Answer 3

dont

Question 4

angular motion planes moves ___ to the line of a plane of motions

Answer 4

parallel

Question 5

name the 4 variables that come into play when an object rotates

Answer 5

velocity, force, inertia, momentum

Question 6

does every joint move about an axis of rotation

Answer 6

yes

Question 7

there’s a counter balance between ___ size and velocity

Answer 7

muscle, velocity

Question 8

inertia is the law that an object will

Answer 8

remain in motion unless acted upon by an outside force

Question 9

the ____ (acceleration) of the body limb has to occur in the follow through phase of a moment

Answer 9

inertia

Question 10

angular velocity v angular speed.
angular ___: rigid body, assuming it will move about a circle at the same velocity. length doesn’t matter. this is about the distance it travels and the time it travels.

angular ___. this includes multiple body parts. Angular speed on the outside of the circle is greater than the body part on the inside of the circle.

Answer 10

velocity, speed

Question 11

tangential velocity dictates how much force will an object be struck with. directly related to the radius of the circle and the angular velocity.

Question 12

the formula to find tangential velocity is as follows

Answer 12

A * Raidus * (finish this)

Question 13

centripetal and centrifugal forces are when the body itself is ___

Answer 13

rotating

Question 14

whenever there is rotation, there is an interplay between __
finish this*

Answer 14

inertia,

Question 15

___ force is pulling in towards the body

Answer 15

centripital

Question 16

___ force is an object wanting to move away from the body

Answer 16

centrifugal

Question 17

an increase in athletes rate of spin increases to the second power, or squares the demand for ___ force

Answer 17

centripetal

Question 18

banks on an indoor track allow for the ____ force applied by the individual to be maximized by the track counteracting the centrifugal forces acting against you.

Answer 18

centripetal

Question 19

what two forces are applied to a car when going around a curve too fast

Answer 19

centripetal and centrifugal

Question 20

rotary inertia is an object’s ___ or ___ to rotation

Answer 20

resistance, persistence

Question 21

what are the two important factors in rotary inertia

Answer 21

object mass and its distribution of the mass

Question 22

when doubling your speed you have to __ the force applied

Answer 22

quadruple

Question 23

the more ___ an object has, the more ___ it puts up against being rotated.

Answer 23

mass, resistance

Question 24

rotary inertia is mostly applied ___.

Answer 24

instinctively

Question 25

radius of ___ is the distance from the axis of rotation and the center of gravity for the segment that is rotating.

Answer 25

gyration

Question 26

rotary interia is dictated by the radius of ___.

Answer 26

gyration

Question 27

radius of gyration is the distance outside of the __ of ___

Answer 27

center of gravity

Question 28

how an athlete initiates rotation.
why do we through a football thrown in a spiral?

Answer 28

for accuracy and distance

Question 29

___ forces are applied about the center of gravity dictates if we spin less or more

Answer 29

where

Question 30

___ forces make it easy to start a spin

Answer 30

verticle