ROTATIONAL MOTION

What is the direction of angular momentum defined by?

• Left-hand rule
• Clockwise rule
• Right-hand rule
• Magnitude rule

Which of the following represents the distributive law for cross product?

• a × (b + c) = a × b − a × c
• a × (b + c) = a·b + a·c
• a × (b + c) = a × b + a × c
• a × (b + c) = (a + c) × b

What is the cross product of k and j?

• i
• −i
• j
• 0

If a and b are non-zero and a × b = 0, then the angle between them is

• 90°
• 45°
• 0° or 180°
• 30°

Which of the following is true for a × b?

• It lies in the plane of a and b
• It is parallel to a
• It is parallel to b
• It is perpendicular to both a and b