ROTATIONAL MOTION

In the context of rotational motion, what does the position vector r connect?

• Origin to particle
• Axis of rotation to the particle
• Center of mass to particle
• One particle to another

If a × b = c, what is the direction of c relative to a and b?

• Parallel to a
• Parallel to b
• Perpendicular to the plane of a and b
• At 45° to both

What is the primary difference between dot product and cross product?

• One uses sin, other uses cos
• Dot product gives scalar, cross product gives vector
• They are the same
• Dot product is for 2D, cross for 3D

Which of the following is true about the vector product?

• It results in a scalar
• It is commutative
• It results in a vector
• It is undefined for 3D vectors

What is the result of the cross product of two perpendicular unit vectors?

• Zero vector
• A scalar
• A unit vector perpendicular to both
• A vector in the same plane