Question

Problem 14.47) Disks A, B, C, and D can ślide freely on a frictionless horizontal surface. Disks B, C, and D are connected by light rods and are at rest in the position shown when disk B is struck squarely by disk A which is moving to the right with a velocity vo 12 m/s. The masses of the disks are m,-m,-mc - 7.5 kg, and m 15 kg. Knowing that after impact disks A and B are bound togetherV) determine (a) the speeds Vc', and V', and (b) the change of kinetic energy AT right after the collision. Vo Problem 14.50 Three spheres A, B, and C, each of mass m0.2 kg), are connected to ring D by three rigid cords of length I (= 0.5 m). The masses of ring and cords are negligible. The structure rotates (ω= 15 rad/s) freely on the frictionless surface (x-y plane). Determine th 30° velocity of D and the angular velocity of ADB afte cord DC breaks and the other cords become tau (when A, D and B are located on a line). 120° Problem 15.123 5 50 mmCollar D slides on a fixed vertical rod. The disk has constant angular velocity ω-0-10 rad/s. Knowing tha rod BD is 250 mm long, determine the velocity and acceleration of collar D when θ 90°. 150 mm-

Answer 1

Date: P-4-4 0% me 35 (12)37552 (12) mann emta about ct A Vo 0.25(12) 公 -

2 1, 540 2 2. 2 2. 2 ヒー一540-163.3 Ene 5 40 0-696 ㄒㄧ

p-14 m/y 2 2. 2 vy 2m 2 Mas cantru liar at Psint mid 3 2 2. 2 2. tumi 2.

千 2. 4 2. 2. 2166 2- 1 6

5 in to Sim B