Rotational Motion Quiz

What is rotational motion?

• Motion in a straight line

• Motion around a fixed point

• Motion without changing position

• Motion in a vacuum

What unit is commonly used to measure angular displacement?

• Radians

• Degrees

• Kilometers

• Meters

How is angular velocity represented symbolically?

• Beta (β)

• Alpha (α)

• Omega (ω)

• Gamma (γ)

What equation relates linear velocity to angular velocity?

• v = ω + r

• v = ωr

• v = ω/r

• v = r - ω

What is the unit for frequency?

• Meters per second

• Radians per second

• Hertz

• Seconds per cycle

What is the standard unit for angular acceleration?

• Meters per second squared

• Radians per second squared

• Degrees per second squared

• Hertz

What does centripetal acceleration point towards?

• Perpendicular to the radius

• The center of the circle

• The direction of motion

• Away from the center

How is tangential acceleration calculated?

• Angular acceleration times radius

• Angular acceleration divided by radius

• Linear acceleration divided by radius

• Linear acceleration times radius

Match the following

• a

• x

• F=ma

• v

• Vf=Vo+at

Answer explanation

Relationship between angular and linear motion

The linear displacement of a rotating object is given by rθ, where r is the distance from the rotational axis.

The linear speed of a rotating object is given by v = rω

The linear acceleration of a rotating object is given by a = rα.

Rotational kinematics -- Equations

The constant-acceleration kinematics equations for rotation are essentially identical to those for linear motion:

Match the following

• Rotational Inertia of a point object

• Angular Momentum of an extended object

• mvr

• Rotational Kinetic Energy

• Angular momentum of a point object

• kmr²

• Rotational Inertia of an extended object