ROTATIONAL MOTION

If a × b = 0 and a and b are non-zero, what must be true?

• They are perpendicular
• They are at 45°
• They are equal
• They are parallel

What is the role of the right-hand screw rule in vector products?

• To calculate magnitude
• To add vectors
• To determine the direction of the resultant vector
• To find the angle between vectors

How does the magnitude of the cross product change as the angle between vectors increases from 0° to 90°?

• It decreases
• It remains constant
• It increases
• It first decreases then increases

What is the result of the cross product if two vectors are parallel?

• Unit vector
• Zero vector
• Vector perpendicular to both
• Maximum magnitude

In the vector equation v = ω × r, what is the relationship between the directions of ω and r?

• Both are tangential
• Both are radial
• ω is axial, r is radial
• ω is radial, r is axial