ROTATIONAL MOTION

What is the definition of angular momentum for the ith particle in a system?

• li = ri + pi
• li = ri · pi
• li = ri / pi
• li = ri × pi

In the expression l = r × p, what does 'r' represent?

• Radius of the circular path
• Linear displacement
• Position vector of the particle with respect to a given origin
• Rotational displacement

How does angular momentum depend on the point of reference?

• It is always same
• It changes with reference point
• It depends on time
• It is constant

What is the direction of angular momentum for clockwise motion in xy-plane?

• Along positive z-axis
• Along negative z-axis
• Along x-axis
• Along y-axis

Can a particle have angular momentum without being in circular motion?

• No
• Yes
• Only in circular paths
• Only if accelerating