Circular Motion Flashcards
How do you convert degrees to radians/vice versa?
Multiply by the one you want on top, and the one you have on the bottom.
(i.e if you want radians multiply by pi over 180 degrees)
Define ‘tangential speed’.
The linear speed of an object tangential to the circle.
What is the linear speed of a particle?
The distance travelled by the particle along the arc with respect to time.
What is meant by angular velocity?
The rate of change of an angle with respect to time (rad/s).
What is a period (T) in relation to circular motion?
The time taken to complete a full revolution.
Define centripetal force.
The force directed towards the centre of a circle needed to keep the body moving in a circular path.
What are the conditions needed for a satellite to be in geostationary orbit?
- It must be on the equatorial plane.
- Its period of orbit must be 24hrs.
- It must move in the same direction as earth.
Define one radian.
The angle subtended from an arc that has a length equal to the radius.
