Questions 15-16
A solid cylinder of mass m and radius R has a string wound around it. A person holding the string pulls it vertically upward, as shown above, such that the cylinder is suspended in midair for a brief time interval Δt and its center of mass does not move. The tension in the string is T, and the rotational inertia of the cylinder about its axis is 21MR2
16. The linear acceleration of the person's hand during the time interval Δt is
(A) mT−mg
(B) 2g
(C) 2g
(D) mT
(E) zero