Circular Motion

Question 1

What is meant by angular velocity (ω)?

Answer 1

The angle swept out by the radius in a specific time

Question 2

Why does an object in circular motion feel a force?

Answer 2

› Has constantly changing direction therefore must be accelerating
› The acceleration (called centripetal acceleration) always acts towards the centre
› Due to Newton’s second law (F=ma) it must also feel a centripetal force towards the centre

Question 3

How many radians are there in a full circle?

Answer 3

2π

Question 4

What is meant by angular frequency?

Answer 4

The angle swept out by the radius per second