Engineering, 24.05.2020 04:02, juliannabartra
A pulley-block system is used for testing in a UHart mechanics lab. The pulley has an outer radius of R = 0.75 m, an inner radius of 0.44 m, a mass-moment of inertia of IG = 7.5 kg*m2 , and is constrained to rotate about its mass center G. The inner radius has a cord wrapped around it that is used to pull the block, which has a mass of 5.8 kg. The coefficient of friction µ between the block and the surface is 0.37. A second cord wound around the outer radius of the pulley is pulled down with a constant force F of 22 N which starts the system from rest. There is no slip between the cords and the pulley. (a)(15 points) Draw the FBD and the MAD for the system, showing all forces and resulting motions, (b) (20 points) Determine the angular velocity ω of the pulley after 5 seconds.
Answers: 3
Engineering, 04.07.2019 18:10, meganwintergirl
Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise
Answers: 3
Engineering, 04.07.2019 18:10, bckyanne3
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10, ijohnh14
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
A pulley-block system is used for testing in a UHart mechanics lab. The pulley has an outer radius o...
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