ch 12 Flashcards
1
Q
what is the definition of radians
A
the angle subtended at the centre of a circle by an arc equal in length to the radius of the circle
2
Q
what is the equation of a radian
A
0=s/r
3
Q
what is angular speed
A
defined as the angle swept out by the radius of the circle per unit time
4
Q
equation of angular speed
A
w=0/t
5
Q
equation of linear velocity
A
v=wr
6
Q
what is centripetal acceleration
A
the acceleration of any object moving in a circle that is always towards the centre of the circle
7
Q
what is centripetal force
A
force acting on an object moving in a circle to cause the centripetal acceleration , it acts towards the centre of the circle
8
Q
centripetal acceleration equation
A
a= v^2/r or w^2r
9
Q
centripetal force equation
A
f= mv^2/r or mw^2r
