Angular Kinematics - 2 Flashcards
The angular displacement of all points along a rotating object is…
The same regardless of how large the radius of the circle is
The angular displacement of an object measured anywhere along thelength of the object is always…
the same
What does the actual linear path taken for each point depend on (this is the arc length)
The distance that point is from the radius of rotation
What is arc length
The curvilinear distance traveled by the point of interest
What is angular speed
The angular distance covered by the time interval over which the motion occurred
What is angular velocity
The angular displacement that occurs during a given period of time
For a given angular velocity, linear velocities are…
Different depending on the distance from the radius of rotation
What is tangential velocity
The linear velocity of a given point traveling along an angular path
tangential velocity is a ____ velocity even though it is the result of ___ motion
linear
angular
What is angular acceleration
The change in angular velocity occurring over a given period of time
When does angular acceleration occur
When somethings starts, stops, speeds up, or slows down in a circular path
What is the tangential acceleration
The component of linear acceleration tangent to the circular path of a point on a rotating object called the tangential acceleration
Manipulating the radius or the length can affect…
the linear displacement or velocity
To get the angular representation of a linear quantity you…
multiply by the radius
What is centripetal acceleration
A force applied that causes something is turning around a circle
How is the force applied in centripetal acceleration
Directed toward to centre of the circle. To the axis of rotation
If something is turning around a circle it requires _____ to change direction
external force
What is required to maintain an object travelling at an angular velocity in a circular path at a certain radial distance ?
An inward acceleration (or radial acceleration)
When an object is rotating, what are the two types of linear acceleration acting on the object
Tangential acceleration and radial acceleration
How do two types of linear acceleration acting on the rotating object act in relation to each other
at 90 degrees to each other
The two linear accelerations of an object travelling around an axis can be added together using _____
Pythageroms theorem
