In Fig. 10-42, a cylinder having a mass of 2.0 kg can rotate 5.0 cm about its central axis through point O. Forces are applied as shown: F-6.0 N, F₂ 4.0 N, F3 2.0 N, and F-5.0 N. Also, r = and R-12 cm. Find the (a) magnitude and (b) direction of the an- gular acceleration of the cylinder. (During the rotation, the forces maintain their same angles relative to the cylinder.) F₁ 瓦 R 0 Figure 10-42 Rotation axis 14 15 F Figure 10-46 shows particles 1 and 2, each of mass m, fixed to the ends of a rigid massless rod of length L₁+ L2. with L-20 cm and L₂ 80 cm. The rod is held hori- 4 -12- I Figure 10-46 zontally on the fulcrum and then released. What are the magni- tudes of the initial accelerations of (a) particle 1 and (b) particle 2?