ROTATIONAL MOTION

What is the vector product of a vector with the zero vector?

• The original vector
• Zero vector
• Undefined
• A unit vector

How does the linear speed of a particle in rotation change with distance from the axis?

• It decreases
• It remains constant
• It increases linearly
• It increases quadratically

What is the result of î · (ĵ × k̂)?

• 0
• 1
• -1
• k̂

If ω is along the z-axis and r is in the xy-plane, what is the direction of v = ω × r?

• Along z-axis
• Along r
• In the xy-plane, perpendicular to r
• Opposite to ω

What is the geometric interpretation of the magnitude of the cross product?

• Sum of lengths
• Product of magnitudes
• Area of the parallelogram formed by the two vectors
• Volume of the box