Circular Motion Flashcards
1
Q
Define ‘radian’
A
Angle subtended at the center of the circle by an arc equal in length to the radius
2
Q
Define ‘angular velocity/angular speed’
A
Rate of change of angle/angular displacement swept out by radius
3
Q
State the relation between angular velocity and period
A
ω x T = 2Π
4
Q
Explain why one complete revolution is equivalent to an angular displacement of 2Π radians
A
Arc length is L=rθ, circumference is 2Πr
5
Q
Explain how a satellite may be in a circular orbit around a planet
A
Gravitational force provides centripetal force
6
Q
Define ‘angular frequency’
A
2Π x frequency, or 2Π/period
7
Q
Centripetal force formula = ?
A
mrω^2, (mv^2)/r
8
Q
Acceleration = ?
A
rω^2, v^2/r
9
Q
Arc length = ?
A
L = rθ
10
Q
Velocity formula = ?
A
v = ωr
11
Q
Angular speed formula = ?
A
▲θ/▲t, (2Π)/T, 2Πf
