Rotational Kinematics Recap

The motion of the body turning about an axis whose each particle of the body moves along a circular path.

• circular motion

• rotational motion

• translational motion

• rectilinear motion

An object rotates from an initial position, θ_i to a final position, θ_f

• angular velocity

• angular acceleration

• angular displacement

• angular speed

The rate at which angular displacement changes with time

• angular displacement

• angular acceleration

• angular velocity

• tangential velocity

The rate at which angular velocity changes with time.

• angular displacement

• angular velocity

• angular speed

• angular acceleration

For an object rotating about an axis, every point on an object has the constant angular velocity.

• TRUE

• FALSE

Object rotating about an axis at constant angular velocity has zero angular acceleration.

• FALSE

• TRUE

The SI unit for angular velocity is _____.

• deg/s

• rad/s

• rev/min

• rev/s

What quantity relates linear or translational description of motion with rotational description of motion?

• radius

• time

• angle measurement

• speed

When an object rotates about an axis counterclockwise, its angular displacement has _____ value

• positive

• negative

• zero

• same

In Physics, this refers to a body with definite shape and size.

• blackbody

• rigid body

• compact body

• inbody