ROTATIONAL MOTION

How is Newton’s second law modified for a system of particles?

• F = m1a1 + m2a2 + ... + mnan
• F = Mv
• F = Ma only
• F_ext = dP/dt

Which principle explains why the center of mass of an exploding projectile continues on its original path?

• Conservation of energy
• Newton’s third law only
• Law of inertia
• Conservation of linear momentum

What happens to the total momentum of a system when external forces are balanced?

• It increases
• It decreases
• It oscillates
• It remains constant

If a system explodes in space far from any gravitational field, how does the center of mass move?

• It stops
• It accelerates outward
• It follows a curved path
• With constant velocity in a straight line

What is the primary factor that determines the trajectory of the center of mass?

• Internal forces
• Mass distribution alone
• Initial position only
• External forces