Circular Motion Flashcards
Kinematics of uniform circular motion Centripetal Acceleration Centripetal Force
1
Q
Angular displacement θ
A
s = rΘ
s arc length
r radius of arc
2
Q
One radian
A
angle subtended at the centre of the circle when arc length is the same as the radius of the arc
3
Q
angular displacement θ
A
angle rotated by an object about an axis from its initial angular position to its final angular position
4
Q
Angular velocity ω
A
ω =δθ/δt
units rad s⁻¹
5
Q
linear velocity v
A
v = δs/δt = δrθ /δt =r δθ /δt = rω units m s⁻¹
6
Q
Period T of a circular motion
A
time taken to complete one revolution
T= 2π/ω
7
Q
frequency f of an object in circular motion
A
number of revolutions the object makes per unit time
f = 1/T
= ω/2π
units Hz or s⁻¹
8
Q
centripetal acceleration a
A
a = v²/r
= rω²
9
Q
Centripetal Force Fc
A
Fc = m ac
= mv²/r
= m r ω²
