Circular Motion

Question 1

Define velocity in terms of circular motion:

Answer 1

v = 2pir/T

Question 2

Define 1 radian:

Answer 2

One radian is the angle subtended at the centre of the circle by an arc length equal to the circle’s radius

Question 3

Define angular velocity:

Answer 3

Rate of change of angle

Question 4

Angular velocity equation:

Answer 4

w= 2pi/ T
OR
w=2pif
(where w = omega)

Question 5

Define centripetal force:

Answer 5

A centripetal force is a resultant force directed towards the centre of a circle and acts perpendicular to the direction of motion

Question 6

What are the conditions for circular motion?

Answer 6

For an object to move in a circle at a constant speed or in uniform motion, the centripetal force, F, must be perpendicular to the direction of motion and acting towards the centre of the circle