Select the smallest acceptable bearing (bore) .

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1. A helical idler gear (see Chapter 15) is to be supported at the center of a short hollow circular shaft using a single-row radial ball bearing. The inner race is presses on the fixed nonrotating shaft, and the rotating gear is attached to the outer race of the bearing. The gear is to rotate at 900 rpm. The forces in the gear produce a resultant radial force on the bearing of 1800 N and a resultant thrust force on the bearing if 1460 N. The assembly is subjected to light shock loading conditions. Based on preliminary stress analysis of the shaft, it must have at least a 50-mm outside diameter. It is desired to use a bearing that will have a life of 3000 hours with 99 percent reliability. Select the smallest acceptable bearing (bore) .

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Find a combination of dimensions and lubricant parameters suitable for this conveyor application.

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1.A hydrodynamically lubricated plain bearing is to be designed for a conveyor-roller support application in which the rotating cold-rolled steel shaft must be at least 100 mm nominal diameter and the bushing is to be made of poured babbitt, reamed to size. The radial bearing load is to be 18.7 kN. The desired ratio of length to diameter is 1.0. The shaft is to rotate continuously at a speed of 1000 rpm. Low friction drag is regarded as more important than high load-carrying capacity. Find a combination of dimensions and lubricant parameters suitable for this conveyor application.

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Conduct a preliminary design study to determine a combination of dimensions and lubricant parameters suitable for this application.

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1. For the design result you found in solving

a. Find the friction drag torque.

b. Find the power dissipated as a result of friction drag.

2. A hydrodynamically lubricated plain bearing is to be designed for a machine tool application in which a rotating steel spindle must be at least 1.00 inch nominal diameter, the bushing is to be bronze, and the steel spindle is to be lapped into the bronze bushing. The radial bearing load is 40 lb, and the spindle is to rotate at 2500 rpm. The desired ratio of length to diameter is 1.0. Conduct a preliminary design study to determine a combination of dimensions and lubricant parameters suitable for this application.

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prepare a business report to Senior Management discussing • Potential ethical or privacy issues (general or game specific) you have identified with the new game

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MonGamerz is an online games developer specialising in Multi-Player games similar to World of Warcraft, Elder Scrolls Online, Guild Wars 2 and Skyforge. The typical target market of these games are adults over the age of 18 years. A recent change in leadership has MonGamerz looking to tap into a new demographic – children between the ages of 8 and 14 – with a new mobile multiplayer game designed to actively engage the player and build a community of friends. Some of the features being considered by the development team include: • State of the art graphics that is attractive to kids • Daily quests and scheduled events for bonus points and power-ups • Easy to transact in-game purchases for quick advancements and power-ups • Group and peer-to-peer communications to keep in touch with friends • Location awareness so they can see where their friends are across the world, even if they are on the move • Faster advancement for more hours of game time to reward active members MonGamerz has recently made a number of public statements about being a socially responsible company. Before Senior Management approves the features of the new game, they have asked whether there are any ethical or privacy issues with the game that may impact the company’s reputation in the community. You are to prepare a business report to Senior Management discussing: • Potential ethical or privacy issues (general or game specific) you have identified with the new game; and • your practical recommendations on how to address these issues.

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Identify the reasons for employees resisting the change to an open-plan office approach.

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a. Identify the reasons for employees resisting the change to an open-plan office approach. b. Explain what the partners might have done better to have minimised the resistance. 2. a. Analyse the barriers to communication (‘noise’) that appear to exist in the law firm. b. Discuss how they could be overcome. 3. a. Discuss the sources of power the partners and others appear to have and the impact this may have on other employees. b. What influence tactics have been used by some of the partners and employees and how effective might they have been?

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