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Two friends A and B (each weighing 40 kg) are sitting on a frictionless platform some distance d apart. A rolls a ball of mass 4 kg on the platform towards B which B catches. Then B rolls the ball towards A and A catches it. The ball keeps on moving back and forth between A and B. The ball has a fixed speed of 5 m/s on the platform. (a) Find the speed of A after he rolls the ball for the first time. (b) Find the speed of A after he catches the ball for the first time. (c) Find the speeds of A and B after the ball has made 5 round trips and is held by A. (d) How many times can A roll the ball? (e) Where is the center of mass of the system "A+B+ball" at the end of the nth trip? ANSWER: (a) CASE - 1  => Total momentum of the man A and the ball will remain constant Therefore , 0 = 4 x 5 - 40 x v v = 0.5 m/s towards left (b) CASE - 2  => When B catches the ball , the momentum between the B and the ball will remain constant. 4 x 5 = 44v v =...

WHat iS DiSney’S ViSion For tHe Future anD miSSion For tHe PreSent? everyone loves mickey mouse and Donald Duck. Walt Disney’s two largest segments are media networks and Parks and recreation. media networks consists of aBC, eSPn, Disney films, newly acquired lucasfilm, and 35 radio stations, among others. Parks and recreation includes the Walt Disney theme parks in the united States, France, China, and Hong Kong, and the more recent Disney cruise line. Disney operates three other divisions: Studio entertainment, Consumer Products, and interactive media. Walt Disney’s actual vision statement is “to make people happy.” However, an improved, authorproposed vision statement for Disney is “to offer the best family entertainment in the world through theme parks, cruises, movies, and radio and television coverage of news and sporting events globally.” Walt Disney’s actual mission statement is “to be one of the world’s leading producers and providers of entertainment and information. using...

A#2, Part 4 Purchasing Your phone:    Ring, ring. [Your name speaking, how can I help you?] Hi [your name].   This is Tom Dollar.   I am down in purchasing and we have run into a snag.   Can you run down and see if you can give us a hand? So what is this all about?             Upon arrival you get a one-minute update.   Tim Apple is “Mr. fixture model L901”.   He functions as the product manager.             Before Tim had gone away on a two-week vacation, Tim had worked out an optimal purchase quantity for a part for the L901 fixture.             Purchasing was trying to process the order.   But a problem had surfaced.   Someone had spilled coffee on the worksheet that Tim had given as backup for the order.   Most of the information was still legible. ...

A#2, Part 3 Comptroller Tom Dollar is a big “fan” of what was once a popular term --- MBWA (management by walking around).               As you are sitting at your desk enjoying a cup of coffee, who should walk in but Tom Dollar.             Salutations, good to see you.   Tom comments “Just the [man][woman][person] I wanted to see.   I just finished a meeting with the CEO.    Mrs. Ennis commented that in the staff meetings we have been talking a lot about supply chains and supply chain management.    She did some reading over the weekend and came away convinced that an important topic is the ability (or inability) to integrate the various aspects of the supply chain. At the next staff meeting she would like a 10 to 15 minute or so presentation on supply chain integration. She is relatively open to the content; but thinks tha...

A#2, Part 2 The Lowe’s project The last item on the weekly management and staff meeting agenda was to consider a proposal for a special manufacturing and sales promotion program.   The manufacturing would last for about a month, and the sales portion would last some 6 weeks. Lowe’s Home Improvement Centers has approached LUML about a joint effort to have a special on two of LUML’s LED fixtures:   the L901 and the L923 (the “L” indicates an LED fixture and bulb).   The production would run from about June 15 to July 15.   The retails sales would be about June 15 to the end of July.   Due to the expected volume LUML would suspend normal production operations (e.g., would accept orders from other customers but would not begin production until after the Lowe’s production ended).   LUML would produce the L901’s and L923’s continuously for a 30-day period.     Lowe’s will handle the advertising, and other promotion. By judicious inventory man...

A#2, Part 1 Light Up My Life, Inc. During the weekly staff meeting, the topics of “Supply Chains” and “Logistics” came up.     There was some attempt by various people to try to explain the differences between these concepts.   But it was clear that an oral discussion was not-doing-a-good-job-of-explaining-the-concepts. Managers; logisticians; supply people; operations; finance all had a slightly different “cut” at what these terms represented. The CEO asked if she could get some information on the topic. Of course, the answer was “of course”.     Mrs. Ennis asked if the information could be provided as a memo to her that would ultimately be sent to the senior managers and senior staff.   Here are her questions. [Points as listed for each question.   Remember that there are also other standard graded elements that are not separately listed.] #1-1.   (100 points) What, indeed, is a supply chain?   Please include ...

Data Sheet: Activity - Osmosis Name Course Date Activity Data Code       Procedure I -Test Solution 1: Water Complete the tablesand questions below using your data and information found under the Background tab Data Table I Note: Difference in Final Volumes = Final Volume of Test Sol - Final Volume of Water Trial Starting Volume of Test Solution (L) Starting Volume of Water (L) Final Volume of Test Solution (L) Final Volume of Water (L) Difference in Final Volumes (L) 1 1.28 1.75 1.51 1.52 -0.01 2 1.28 2.00 1.64 1.64 0 Observations and Questions [1] Given that the final heights (and volumes) are the same for the water and test solution, what can you...