Circular Motion Flashcards
Define radian:
angle subtended at the centre of a circle by an arc that is equal in length to the radius
How many degrees are in 1 radian?
180
How do you convert radians to degrees?
(arc length)/radius
How do you convert degrees to radians?
2π x (angle)/360
Define angular velocity:
rate of change of the angle (2πf)
What is centripetal force?
any force that keeps a moving body with uniform speed along a circular path
What is centripetal force perpendicular to?
velocity of the object
What is linear speed?
distance an object covers per unit time
How do you calculate linear speed?
radius x 2πf
What is centripetal acceleration?
when an object is moving in a circle speed is constant but velocity changes due to direction
How do you calculate centripetal acceleration?
w²r or v²r
How do you calculate centripetal force?
(mv²)/r or mw²r²
Within an object moving in a circular motion how do you calculate resultant force?
difference between weight and support force (mg-s)
When a moving object loses contact with the floor what has happened?
if its speed is equal to or greater than v0 which happens if support force is 0.
