ROTATIONAL MOTION

What is true about angular velocity for all points in a rigid body rotating about a fixed axis?

• Angular velocity increases with radius
• Different points rotate at different angular speeds
• Only outer points have angular velocity
• All points have the same angular velocity at any instant

What characterizes the path of a particle in a rigid body rotating about a fixed axis?

• Straight line parallel to the axis
• Elliptical orbit around the center
• Helical spiral along the axis
• Circular path in a plane perpendicular to the axis

In pure translational motion, how does the velocity of each particle compare?

• Velocities vary with mass
• Only edge particles move
• Center particles are faster
• All particles move with the same velocity at any instant

When a rigid body is fixed along a line, what type of motion is possible?

• Pure translational motion
• Vibrational motion
• Random motion
• Rotational motion only

Which statement best defines a rigid body in mechanics?

• It has uniform density throughout
• It can deform under large forces
• The distances between particles remain constant despite applied forces
• It must be made of metal