DC -- angular acceleration

Which term = uniform circular motion

• velocity perpendicular to the surface

• constant angular velocity

• applied force at an angle

Which equation would be used to calculate angular velocity?

• 
• 
• 
• 

According to sign convention, which direction is considered negative?

• clockwise

• counterclockwise

When the angular velocity changes, which variable is affected?

• radius of curvature

• angular acceleration

• the torque

• the linear velocity

What are the units of angular acceleration?

• Newtons

• rad/s

• radians

• rad/s/s

Which of the following is an example of angular acceleration?

• a child starts up a merry-go-round from rest

• a child falls off a merry-go-round and rolls forward

• a dead ladybug on a turntable left on when somebody walked out of the room

Linear acceleration is also called ----

• tangential acceleration

• uniform velocity

• constant angular velocity

• a change in angular velocity

Tangential acceleration, a_t, is directly related to the angular acceleration, α, and is linked to an increase or decrease in the velocity, but not a change in its ____.

• radius

• angle

• direction

• force

Linear acceleration and angular acceleration are ____ proportional.

• directly

• inversely

Angular acceleration is a vector, having both magnitude and direction. How do we denote its direction?

• by color

• with a small up/down arrow behind the number

• with a free body diagram

• with a positive or negative sign