P3.1 - Circular Motion

What is Period, T for a point describing a circle defined as?

Time taken for one complete circuit

What is Frequency, f defined as?

The number of circuits or cycles per second

What is the radian defined as?

A unit of measurement of angles equal to about 57.3 degrees, equivalent to the angle subtended at the centre of a circle by an arc equal in length to the radius

How can we convert radians to degrees

Angle x 180/\pi

How can we convert degrees to radians?\pi

Angle x \pi / 180

What is angular velocity defined as?

Angle swept out by the radius in unit time

What are the equations for angular velocity?

ω=angle/t

ω=2\pi f = 2\pi /T

What is centripetal force?

The resultant force acting on a body moving at constant speed in a circle. Directed towards the centre of the circular motion

What is centripetal acceleration?

An acceleration that applies to motion on a circular path. Directed towards centre of the circle

Which direction are centripetal acceleration and force directed towards?

Centre of the circle

What does continuous change in direction imply during circular motion?

Change of velocity and acceleration

How do we calculate tension from the bottom of a circle?

T = F + W

How do we calculate tension from the top of a circle?

T = W - F

What is the requirement for vertical circular motion to occur?

Centripetal Acceleration is greater than or equal to acceleration due to gravity

What is the relationship between T and f?

T = 1/f

f = 1/T