Circular Motion Flashcards
1
Q
Define radian.
A
The angle subtented at the centre of a circle by an arc equal in length to the radius of the circle.
2
Q
What does subtend mean?
A
Form an angle at a particular point when straight lines from its extremities are joined at that point.
3
Q
Define angular speed.
A
The angle swept out by the radius per unit time.
4
Q
Define angular velocity.
A
The angle swept out by the radius per unit time in a given direction. Rate of change of the angle.
5
Q
Define centripetal acceleration.
A
Acceleration towards the centre of a circle.
6
Q
Define centripetal force.
A
Resultant force acting towards the centre of a circle causing centripetal acceleration.
