6. Angular Kinematics

Question 1

What is Angular Distance?

Answer 1

Angular Distance

• (Φ – Phi pronounced fee)
• The total amount of rotation
• Scalar Quantity
• Units: degrees (°), revolutions (rev), or radians (rad)

Question 2

What is Angular Displacement?

Answer 2

Angular Displacement

• (Θ - Theta)
• The change in angular position
• Vector Quantity
• Units: degrees (°), revolutions (rev), or radians (rad)

Question 3

What is Angular Speed?

Answer 3

Angular Speed

• (σ – Sigma)
• Scalar Quantity
• ∆ distance / ∆ time
• Units: °/s, rev/s, or rad/s

Question 4

What is Angular Velocity?

Answer 4

Angular Velocity

• (ω – Omega)
• Vector Quantity
• ∆ angular displacement / ∆ time
• Units: °/s, rev/s, or rad/s

Question 5

What is Angular Acceleration?

Answer 5

Angular Acceleration

• (α – alpha)
• Vector Quantity
• ∆ angular velocity / ∆ time
• Units: °/s2, rev/s2, or rad/s2

Question 6

What is the angular acceleration of the second hand on a clock after one complete revolution?
a) 60°/s2
b) 6°/s2
c) 0°/s2
d) Need more information

Answer 6

c) 0°/s2

Question 7

What do the signs in front of the displacement and velocity values tell us about human movement?

Answer 7

+ = Counterclockwise

- = Clockwise

Question 8

If an object is rotating at -3.5 rev/s2, what is happening?

a) The object is rotating clockwise AND speeding up
b) The object is rotating counterclockwise and slowing down
c) Neither A nor B is correct
d) Either A or B are correct

Answer 8

d) Either A or B are correct