ROTATIONAL MOTION

What is the center of mass of a system of three particles if two have equal mass and are symmetrically placed about the third?

• It is at the third particle
• It is at the midpoint of the two equal particles
• It is outside the system
• It lies along the line of symmetry

In the limit of infinitesimal mass elements, what replaces the summation over discrete masses?

• Differentiation
• Multiplication
• Subtraction
• Integration

What is the effect of choosing a different origin on the value of ∫ r dm?

• It has no effect
• It makes the integral zero
• It doubles the integral
• It changes the value of the integral

How does the center of mass of a homogeneous spherical shell compare to its geometric center?

• The center of mass is inside but not at center
• The center of mass is outside
• The center of mass is at the top
• They are the same

What happens to the center of mass integral when the body is asymmetric?

• It becomes zero automatically
• It is always at the edge
• It disappears
• It must be evaluated directly