ROTATIONAL MOTION

What is the motion of a potter’s wheel when in use?

• Translational motion
• Rolling motion
• Oscillation
• Rotation about a fixed axis

What type of motion is exhibited by a rigid body when it is fixed along a straight line?

• Pure translation
• Random motion
• Rotation
• Vibrational motion

Why does a point at the bottom of a rolling wheel have zero velocity in pure rolling?

• Because friction stops it
• Because it is not moving
• Because translational and rotational velocities cancel each other
• Because gravity holds it

In the case of a cylinder rolling without slipping, what is the relationship between linear velocity (v) and angular velocity (ω)?

• v = ω/r
• v = ω²r
• v = ωr
• v = r/ω

What happens to the velocity of a point on a rotating body as it moves closer to the axis of rotation?

• It increases
• It remains constant
• It becomes zero immediately
• It decreases