Flashcards
Circular Motion Basics
Cards in this deck (13)
- 1The distance covered by an object moving in a circle in one period is the ....Circumference of the circle
- 2How do we calculate the circumference of a circle?π x d
- 3How do we work out the time period?T = 1/f
(f = frequency)
Note f = 1/T as well - 4How do we work out velocity when an object is moving in a circle?v = (π x d) / T
(T = time period)
or v = π x d x f
(f = frequency) - 5In circular motion, velocity is constantly.....Changing, as direction is constantly changing
- 6What is the symbol for angular speed?ω
- 7How do we calculate angular speed?ω = (2π) / T
OR
ω = (2π)f - 8How do we calculate angular velocity?v = rω
(r = radius) - 9What are the conditions of angular velocity?Resultant force is perpendicular to velocity (RF towards centre, v is at tangent).
This is called the centripetal force, which results in centripetal acceleration. - 10Diagram of above: (R = resultant force)
- 11How to calculate centripetal acceleration:a = (v^2)/r
OR
a = rω^2 - 12How to calculate centripetal force:F = (mv^2)/r
OR
F = mrω^2 - 13Note the centripetal is not a....Physical force, just circumstantial