Angular Kinematics Flashcards
What is the influence of arm length when throwing a discus?
An increase in arm length = increase in distance
T/F Angular kinematics values are not described the same way as linear kinematics values
False, they are described the same way
Define displacement
Change in position
Define velocity
Change in position relative to the interval in which it takes place
Define acceleration
Change in velocity relative to the interval in which the change takes place
What type of force is applied in angular kinematics
eccentric force
T/F for angular kinematics, there is a specified axis of rotation
True
When can the reference axis move
In relative angular position
When can the reference axis not move
In absolute angular position
Define angular displacement
Change in angular position of a segment or any point on the rotating segment
what is the formula for angular displacement
angular displacement = final - initial
In curvilinear displacement, what will happen to all the points on the line
They will be angularly displaced the same amount
What will linear displacement depend on in curvilinear displacement
On the radius of rotation
What is curvilinear displacement proportional to
To angular displacement
Define angular velocity
The rate of change of angular displacement
What are the 3 rates of motion in angular kinematics
- Average rate of motion
- Instantaneous velocity
- Peak rate of motion
Define tangential linear velocity
Linear velocity of a point on a rotating segment
What is tangential linear velocity tangent to
The path of the object
What does the speed a point moves depend on
On how far that point is from the axis from rotation
Define angular acceleration
A change in magnitude and/or direction of the angular velocity vector with respect to time
Define tangential linear acceleration
Linear acceleration of a point of a rotating segment
Define centripetal acceleration
Acceleration caused by change in direction of the velocity vector
If two people are doing the hammer throw, the weight is the same but the radius for person 1 is longer, who was to pull harder on the string to throw the same distance?
The person with the shorter string
