ROTATIONAL MOTION

What role do internal forces play in the motion of the center of mass?

• They accelerate the center of mass
• They slow it down
• They change its direction randomly
• They have no effect on the motion of the center of mass

How is the motion of the center of mass related to external forces acting on a system?

• It remains stationary always
• It moves randomly
• It depends only on internal forces
• It accelerates according to Newton’s second law

What is true about the motion of particles in a rigid body undergoing pure translation?

• They collide with each other
• They move in circles
• They stop after some time
• They follow parallel paths

What characterizes translational motion of a rigid body?

• Particles move in random directions
• Each particle has different speed
• Only the center moves
• All particles of the body have the same velocity at any instant

What kind of motion does a rectangular lamina exhibit when sliding on a frictionless surface?

• Oscillatory motion
• Rotational motion only
• Vibrational motion
• Pure translational motion