Question

Problem 3: For the mechanism system as shown in Figure 3. The block A is moving down 0,3 m/s in initial condition. Block A has mass of mA 75 kg. The cylinder B is considered a homogeneous solid and moves in frictionless bearings. The mass of cylinder B is m 85 kg and its radius is r 150 mm. Block C has mass of mc 145 kg. The kinetic coefficient of friction between block C and the mc 145 kg k-90 N/m APPRPRERRRER mB 85 k LL-0.2 Figure 3 moving surface is -0,2. The spring is originally compressed 60 150 mm and has a stiffness of k=90 N/m. mA=751 7) (L.O.6.3) The total kinetic energy of the system at the any instant by velocity of block A. a) T 152, 5.v d) T 131,25.v b) T 262,5.v c) T 525.v e) Other: T = .... .. 8) (L.O.6.3) Calculate the work done by all external forces after block A dropping 1,5 m b) U2 595,89 (J) e) Other: U-2 =. c) U-2 525,89 (J) a) U,2 559,89 (J) d) U2 589,9 (J) 9) (L.O.6.3) Calculate the velocity of bock A after dropping 2,0 m. a) v, = 2,4 (m/s) c) vA 2,15 (m/s) b) v 1,48 (m/s) e) Other: v (m/s) 10) (L.O.6.3) Calculate the acceleration of bock A after dropping 2 m. b) a, 1,77 (m/s2) e) Other: a c) a 1,085 (m/s?) a) a, =1,26 (m/s2) ..m/s) d)a 0,68 (m/s)

Answer 1

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