Uniform circular motion Flashcards
Recognise uniform motion in a circle Describe what you need to measure to find the speed of an object moving in uniform circular motion Define angular displacement and angular speed
1
Q
When is an object in uniform circular motion?
A
When it is rotating at a constant rate
2
Q
Describe how to find the speed of an object moving in uniform circular motion
A
Measure the circumference of the circle (2πr )
Measure the time for one rotation (T)
Divide the circumference by the time (2πr / T )
3
Q
State the angular speed equation for an object in circular motion
A
2π/ T, where T is the time for one rotation
(2πƒ)
4
Q
State the angular displacement equation of an object in time t
A
2π x t/T
5
Q
Define angular speed
A
The angular displacement per second
6
Q
State an alternative equation for linear speed
A
w x r (where w is angular speed)
7
Q
Prove that s =ør
A
S = vt
S = 2πrt/T
S = ør
