ROTATIONAL MOTION

In Example 6.3, how many squares make up the L-shaped lamina?

• 2
• 3
• 4
• 5

Where does the center of mass of a uniform triangular lamina lie?

• At the midpoint of the longest side
• At the circumcenter
• At the centroid
• At the orthocenter

What is the significance of the median in finding the center of mass of a triangle?

• It divides the triangle into equal areas
• It balances the angles
• The center of mass lies on each median due to symmetry
• It represents the height

In an equilateral triangle with masses at vertices, why is the center of mass not at the geometric center?

• Because the triangle is not symmetric
• Because the masses at the vertices are unequal
• Because the coordinate system is skewed
• Because gravity affects one mass more

What is the y-coordinate of the center of mass for the three-particle system with masses 100 g, 150 g, and 200 g at O(0,0), A(0.5,0), and B(0.25, 0.25√3)?

• √3/6 m
• √3/9 m
• √3/3 m
• 0.25 m