5B.1 Circular Motion Basics Flashcards
what is a radian
a unit of angle measurements
one radian equals to
57.3 degrees
what is the angular displacement
it is the vector measurement of the angle through which something has moved
what is the equation for the angular displacement of a circular motion
angle = s(distance moved (arc lenght0)/r (raduis)
in circular motion anticlockwise rotation
is a positive number
in circular motion clockwise rotation
is a negative number
what is the angular velocity
the rate at which the angular displacement changes units rad per s
what is the equation of angular velocity
w = angle/T
what is the instantaneous velocity
the velocity of an object in a circular motion
what is the equation of the instantaneous velocity
v = rw (find diveration in page 17)
what is centripetal accelaration
it is the acceleration towards the center of the circle that corresponds to the constant change in direction to maintain the object’s orbit around the circle
what is the equation for centripetal accelaration
v^2/r
centripetal accelaration is caused by the change of direction in
the horisantal component only since centripetal accelaration is always directed towards the centre of the circle
what is the derivation of centripetal accelaration
page 18
