Angular Motion

Question 1

State three sports in which angular motion are used?

Answer 1

1. Gymnastics
2. Ice skating
3. Discus throw/athletics

Question 2

Define angular displacement.

Answer 2

Change in angular position.

Question 3

How many revolutions and radians are in 360 degrees?

Answer 3

1. Revolutions = 1

2. Radians = 2π

Question 4

1 radian is the angle created when what two components are the same?

Answer 4

1. Radius

2. Arc length

Question 5

How do you calculate the size of an angle in radians using arc length and radius?

Answer 5

Angle = arc length / radius

Question 6

Are degrees/revs/radians a form of displacement or distance - state why.

Answer 6

Displacement - the athlete hasn’t travelled anywhere, only moved around an axis.

Question 7

What equation can be used to calculate average angular velocity?

Answer 7

Average angular velocity = angular displacement / change in time

Question 8

What equation can be used to calculate average angular acceleration?

Answer 8

Average angular acceleration = change in angular velocity / change in time

Question 9

Circular motion only applies if you use what form of angular displacement?

Answer 9

Radians