Quiz 5 concept slides (angular kinematics)

What is Angular Kinematics?

the kinematics of rotational motion or the study concerned with the description of angular motion independent of torque

How does angular motion occur?

Angular motion occurs when all points on an object move in circular paths about the same fixed axis

What is an angle

refers to the orientation of these lines or planes to each other and

as you already know it use θ as a symbol

How is an angle formed?

An angle is formed by the intersection of two lines, two planes, or a line and a plane

what is a degree?

is a measurement of a plane angle in which one full rotation is 360 degrees

Radians: what is it?

Ratio of the arc length of a circle subtended by that angle, divided by the radius of the circle

1 Radian (rad)

an angle at the center of a circle whose arc

length (l) is equal to the radius (r).

why is radians used for?

Radians are able to make degrees to length and thus, radians make it possible to relate a linear measure and an angle measure

What is the relationship between radians and degress?

π radian = 180 °

Thus, 1 radian = 180° / π = 57.3 °r

Angular position

Angular position refers to the orientation of a line with other line or plan

change in angular position

defined as angular displacement is that Angular analog of linear displacement

Does angular displacement have direction?

yes, it does

What is angular velocity?

the rate at which an object rotates or revolves around an axis, representing how fast its angle changes over time