ROTATIONAL MOTION

What is the number of scalar equations equivalent to vector momentum conservation?

• 1
• 2
• 3
• 4

What is the direction of motion of the alpha particle relative to radon nucleus in CM frame at rest?

• Same direction
• Perpendicular direction
• Opposite direction
• At 45 degrees

How does the center of mass move if the system is initially at rest and no external force acts?

• It moves in a circle
• It accelerates
• It remains at rest
• It moves randomly

What is the role of external forces in center of mass motion?

• They create internal energy
• They balance internal forces
• They determine the acceleration of center of mass
• They are always zero

In the decay of radium, what are the two products?

• Two alpha particles
• Radon nucleus and beta particle
• Radon nucleus and alpha particle
• Two gamma rays