3.1 Circular Motion Flashcards
1
Q
What is the period
A
Time taken for one complete circuit (cycle) (T = 1/f)
2
Q
What is frequency?
A
The number of cycles per second (F = 1/T)
3
Q
What is a radian?
A
The unit measurement of angles. Equal to the angle subtended at the centre of a circle by an arc equal in length to the radius (57.3 degrees or 180/π)
4
Q
What is angular velocity?
A
The angle, θ, swept out by the radius per second (ω = Δθ/Δt) or (ω = 2π/T)
5
Q
What is the formula for speed of an object going around a circle?
A
v = ωr or v = 2πr/T
6
Q
What does centripetal and centrifugal what does mean ?
A
Centripetal acts towards the centre of the circle and centrifugal acts away from the centre.
7
Q
What is the formula for centripetal acceleration?
A
a = v²/ r = rω²
8
Q
What is the formula for centripetal force?
A
F = mv²/r = mrω²
