ROTATIONAL MOTION

What is the SI unit of angular momentum, a vector product?

• N·m
• J·s
• kg·m/s
• kg·m²/s

If vector a is in the north direction and vector b is upward, what is the direction of a × b?

• East
• South
• West
• Down

What is the value of j × i?

• k
• −k
• i
• j

How does the cross product differ from the dot product in terms of result type?

• Both give scalars
• Both give vectors
• Cross product gives a vector, dot product gives a scalar
• Cross product gives a scalar, dot product gives a vector

What happens to the cross product if one of the vectors is zero?

• It becomes undefined
• It equals the non-zero vector
• The result is a null vector
• It doubles in magnitude