Question

# . Block A, with a mass of 4.2 kg, is suspended from a vertical string as shown in Figure 10.The string passes over a pulley and is attached to block

B. The mass of block B is 1.8 kg.The pulley and the surface of the ramp are essentially frictionless. Calculate (a) the acceleration of the blocks and (b) the tension in the string. A fans: (a) 5.3 m/s; (0) 19 NI Two blocks are connected by a massless string that passes over a frictionless pulley (Figure 7). The coefficient of static friction between m, and the table is 0.45. The coefficient of kinetic friction is 0.35.Mass m, is 45 kg, and m, is 12 kg. (a) Is this system in static equilibrium? Explain. (b) Determine the tenslon in the string. (c) A mass of 20.0 kg is added to m,. Calculate the acceleration. . Two masses, connected by a massless string, hangover a pulley that connects two inclines (Figure 8).Mass m, is 8.0 kg, and mass m, is 12 kg. The coefficient of kinetic friction for both inclines is 0.21. Determine the acceleration of the two masses. A 36. Two blocks are connected by a string passing over a frictionless pulley, as shown in Figure 2. When the blocks are in motion, block A experiences a force of kinetic friction of magnitude 5.4 N. The mass of m, is2.3 kg, and the mass of m, is 3.5 kg. (2.1, 2.2) A (a) Calculate the magnitude of the acceleration of the blocks. (b) Calculate the magnitude of the tension in the string. Three masses are connected by strings, as shown in Figure 5. Assume that the masses of the strings are negligible. Calculate the acceleration of each mass and the tension in the string. (2.3) AA

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