Question

#8 Mechanical Equilibrium: suspended blocks A 10.4 kg mass is suspended from the ceiling with a cable of negligible mass. A 12.5 kg mass is attached (and suspended below) the 10.4 kg mass with a cable, also of negligible mass. What are the tensions, respectively, connecting the 10.4 kg mass to the ceiling (cable 1) and the cable connecting the 12.5 kg mass to the 10.4 kg mass (cable 2) O A. cable 1: 102 N; cable 2: 123 N O B. cable 1: 224 N; cable 2: 123 N C. cable 1: 59.3 N; cable 2: 102 N ○ D. cable 1: 84.6 N; cable 2: 157 N #9 Attwood's Machine In an Attwood's Machine, as discussed in class, a 12.0 kg mass and a 20.0 kg mass are connected via massless cable over a frictionless, massless pulley. What is the magnitude of the acceleration of the masses? Use g = 9.80 m/s2 O A. 1.24 m/s2 0 B. 2.45 m/s2 ° C. 4.73 m/s2 D. 9.80 m/s* #10 Attwood's Machine In #9, what is the tension in the string connecting the two masses? O A. 54.0 N B. 75.0 N O C. 105 N O D. 147 N #11 Train cars A train locomotive with a mass of 4000 kg is coupled to a train car with a mass of 5000 kg which is in turn coupled to a caboose with a mass of 2000 kg. If the locomotive accelerates at a rate of 1.45 m/s2, what is: (6) the tension in the coupling to the 5000 kg train car and (ii) the tension in the coupling between the 5000 kg train car and the caboose? Assume all components of the train accelerate at the same rate and neglect the effects of friction. O A. (i) 10,200 N; (ii) 2,900 N O B. (i) 10,200 N; (ii) 10,200 N C. (i) 2,900 N; (ii) 10,200 N D. (i) 6,600 N; (ii) 6,600 N

Answer 1

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