Four uniform rods with identical masses, and equal lengths are arranged as a long two-bladed fan, or as a shorter four-bladed fan, as shown at right. Which fan blade arrangement has the smallest rotational inertia?
A. The two-bladed fan.
B. The four-bladed fan.
C. (There is a tie.)
D. (Not enough information is given to determine this.)
Answer:B
Four uniform rods with identical masses, and equal lengths are arranged as a long two-bladed fan, or as a shorter four-bladed fan, as shown at right. Which fan blade arrangement has the smallest rotational inertia?
A. The two-bladed fan. B. The four-bladed fan. C. (There is a tie.) D. (Not enough information is given to determine this.)