Calculated result of trajectory t (0 ≤ t ≤ 1.5 × 104) for (a) translation, (b) spin, and (c) rotation motions of Pt aggregates based on Eqs. 7, 8. Blue arrows represent particles with the angular displacement of rotation (ϕ) [see the insets in (a)–(c)]. All parameters, excluding drag, ηv, and ηω, are fixed as follows: ⟨|F(t)|2⟩ = 1/6, ⟨N(t)2⟩ = 1/3, x(0) = y(0) = vx(0) = vy(0) = ϕ(0) = ω(0) = 0, m = 0.5, and I = 1.0. Values of direction-dependent drag are described in the insets of (a)–(c).