ROTATIONAL MOTION

What is the result of (−a) × (−b)?

• −(a × b)
• a × b
• 0
• b × a

If vector a points east and vector b points north, what is the direction of a × b?

• Downward
• South
• Upward
• West

How is the direction of the cross product determined using a screw?

• By pushing the screw straight
• By turning the screw from first to second vector
• By rotating the screw randomly
• By measuring screw length

What is the direction of b × a if a × b points north?

• North
• East
• South
• Up

If a × b = 0 and both vectors are non-zero, what must be true about their orientation?

• They are perpendicular
• They are at 45°
• They are parallel or anti-parallel
• They are orthogonal