ROTATIONAL MOTION

What type of motion do the blades of an oscillating table fan undergo?

• Pure translational motion
• Vibrational motion only
• Rotational motion about an oscillating axis
• Random motion

How do the planes of circular motion for different particles in a rotating rigid body relate to each other?

• They are parallel to the axis
• They intersect at random angles
• They are all the same plane
• They are all perpendicular to the axis of rotation

In the diagram of a rigid body rotating about the z-axis, what does the distance r1 represent?

• The mass of particle P1
• The angular speed of P1
• The linear velocity of P1
• The radius of the circular path of particle P1

What is the motion of the axis of a spinning top called when it sweeps out a cone?

• Rotation
• Revolution
• Oscillation
• Precession

In the case of a spinning top with a fixed tip, what is true about its axis of rotation?

• It is always vertical
• It does not pass through the top
• It passes through the point of contact with the ground
• It moves freely in space