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What are radians the unit of?
Angle
What is meant by the period of an object in circular motion?
The time taken for one full rotation.
What is meant by angular velocity?
The angle travelled through divided by the time taken.
What kind of force is required to keep an object moving in a circle at constant speed?
A constant centripetal force, a force that always acts towards the centre of the circular path.
True or false? The centripetal force and velocity of an object moving in a circle are always in the same direction.
False. Velocity is always at a tangent to the circle, force is always along a radius. They are perpendicular
An object moving in a circle at a constant speed is not accelerating. True or False?
False. The direction is always changing hence the velocity is always changing which means it is accelerating.
Note 
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