ROTATIONAL MOTION

What is the primary reason the center of mass continues in uniform motion during radioactive decay?

• Internal energy is released
• Radiation pushes the nucleus
• No external forces act on the system
• Gravity balances the forces

In the lab frame, what is the motion of the center of mass of a decaying nucleus?

• Rest
• Accelerated
• Oscillatory
• Uniform motion

What is the effect of internal forces on the center of mass motion?

• They accelerate CM
• They decelerate CM
• They cause oscillation
• No effect

What is the trajectory of the center of mass in Fig. 6.14(b)?

• Moving in circle
• Moving in straight line
• Accelerating
• Stationary

What is the trajectory of the center of mass in Fig. 6.14(a)?

• Circular
• Parabolic
• Straight line
• Spiral