ROTATIONAL MOTION

What determines the direction of the vector resulting from a cross product a × b?

• Left-hand rule
• Direction of the longer vector
• Right-hand rule or right-handed screw rule
• Direction of the shorter vector

What is the formula for the linear velocity of a particle in a rigid body rotating about a fixed axis?

• v = ω + r
• v = ω · r
• v = ω / r
• v = ω × r

How is angular velocity represented as a vector?

• It has magnitude only and no direction
• Direction is tangential to the circular path
• Magnitude is v/r and direction is radial
• Its magnitude is ω = dθ/dt and direction is along the axis of rotation

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

• Angular velocity increases with distance from the axis
• Different points have different angular velocities
• Only the center has angular velocity
• All points in the body have the same angular velocity at any instant

In rotation about a fixed axis, what is the path of motion for each particle of the rigid body?

• Straight line parallel to the axis
• Elliptical path around the center
• Circular path in a plane perpendicular to the axis
• Random zig-zag motion