2-facility requires lifting heavy boxes from a pallet. The following posture is observed where the torso...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
2-facility requires lifting heavy boxes from a pallet. The following posture is observed where the torso flexion is 30 (i.e., assume a= 30) in lifting a box. Assume this is a symmetrical lift where both arms are in identical postures. CUTTING PLANE HORIZONTAL FCOMP FMUSC X -b -h F SHEAR mgBw Dimension Back muscle moment arm at L5/S1 Mass of the torso and the head Mass of both arms and both hands Horizontal distance from L5/S1 to the mass center of the upper body (including torso, head, arms, hands) Horizontal distance from L5/S1 to the mass center of the box Value 5 cm 30 kg 15 kg 23 cm 55 cm a) (6 pts) Suppose the mass of all items inside the box is 17 kg, and the mass of an empty box is 1kg. Calculate the back-muscle force required to hold the full box in this posture. b) (5 pts) Calculate the disc compression force at L5/S1 in the situation described above. c) (2 pts) Based on your result from b), answer the following question: Is the L5/S1 disc compression force higher or lower than the NIOSH action limit or maximum permissible limit? Justify your answer with the related numbers for both limits. d) (2 pts) When the box is placed in its final position, the worker is standing upright holding the full box, will the disc compression force at L5/S1 most likely increase, decrease, or stay the same when compared to initial lift posture? Briefly explain the reason (no computation needed). 1 e) (2 pts) To reduce the injury potentials, list two recommendations that you have for lifting boxes. 2-facility requires lifting heavy boxes from a pallet. The following posture is observed where the torso flexion is 30 (i.e., assume a= 30) in lifting a box. Assume this is a symmetrical lift where both arms are in identical postures. CUTTING PLANE HORIZONTAL FCOMP FMUSC X -b -h F SHEAR mgBw Dimension Back muscle moment arm at L5/S1 Mass of the torso and the head Mass of both arms and both hands Horizontal distance from L5/S1 to the mass center of the upper body (including torso, head, arms, hands) Horizontal distance from L5/S1 to the mass center of the box Value 5 cm 30 kg 15 kg 23 cm 55 cm a) (6 pts) Suppose the mass of all items inside the box is 17 kg, and the mass of an empty box is 1kg. Calculate the back-muscle force required to hold the full box in this posture. b) (5 pts) Calculate the disc compression force at L5/S1 in the situation described above. c) (2 pts) Based on your result from b), answer the following question: Is the L5/S1 disc compression force higher or lower than the NIOSH action limit or maximum permissible limit? Justify your answer with the related numbers for both limits. d) (2 pts) When the box is placed in its final position, the worker is standing upright holding the full box, will the disc compression force at L5/S1 most likely increase, decrease, or stay the same when compared to initial lift posture? Briefly explain the reason (no computation needed). 1 e) (2 pts) To reduce the injury potentials, list two recommendations that you have for lifting boxes.
Expert Answer:
Answer rating: 100% (QA)
Solutions Step 1 a The backmuscle force required to hold the full box can be calculated using the formula Explanation F m g sin cos where m is the mass of the box and its contents g is the acceleratio... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
Posted Date:
Students also viewed these mechanical engineering questions
-
The following additional information is available for the Dr. Ivan and Irene Incisor family from Chapters 1-5. Ivan's grandfather died and left a portfolio of municipal bonds. In 2012, they pay Ivan...
-
Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...
-
Voguish Couches is a small company which makes sofas. The company is owned by the couple Lennox and Stewart. You are an intern working at Voguish Couches. For the sake of simplicity, this assignment...
-
Should researchers use real-world or risk-neutral default probabilities for a) calculating credit value at risk and b) adjusting the price of a derivative for defaults?
-
What might shift the AD curve to the left? Use the model of AD and AS to trace through the effects of such a shift.
-
What is the relationship between globalization and nationalism in the current-day world?
-
As part of the analytical procedures of Mahogany Products, Inc., you perform calculations of the following ratios: For each of the preceding ratios: Required a. State whether there is a need to...
-
Blaze Corporation allocates overhead on the basis of DLH and the standard amount per allocation base is 2.00 DLH per unit. For March, the company planned production of 10,000 units (80% of its...
-
Consider a binary mixture for which the excess Gibbs energy is given by G E /RT = 2.6x 1 x 2 . For each of the following overall compositions, determine whether one or two liquid phases will be...
-
Marco Benevento, president of Benevento Foods (BF), hung up the telephone and put on his lab coat, safety shoes and hairnet to enter the companys production plant in upstate New York. He never could...
-
Buddy Corporation purchased a new machine for production on 1/1/18. The cost of the machine was $175,000. The salvage value was estimated to be $25,000. Its useful life was estimated to be 5 years...
-
What is the Medigap insurance program? Is the cost of the program fair considering the limits offered by the plan? Explain why. What is the Children's Health Insurance Program (CHIP)?
-
Happy Valley Henssupplies local restaurants and grocery stores with free-range eggs.Recently, they began raising baby chicks and hens for sale toconsumers at farmers markets. The market sellsbaby...
-
On 1/1/21, Vitale Co. invested $1,000,000 in Demo Co. for 25% of its outstanding stock. The equity method of accounting is appropriate. Demo Co. pays out 40% of net income in dividends each year....
-
The ledger of Beckett Rental Agency on March 31 of the current year includes the selected accounts below before adjusting entries have been prepared. Debit Credit Supplies $3,000 Prepaid Insurance...
-
Given the two selected techniques of Lean Manufacturing and Six Sigma. Submit a thread of at least 500 words examining the relationship between the selected techniques/concepts and strategic...
-
If a test has high reliability. O the test measures what the authors of the test claim it measures O people who take the same test twice get approximately the same scores both times O scores on the...
-
Olive Corporation was formed and began operations on January 1, 2012. The corporation's income statement for the year and the balance sheet at year-end are presented below. The corporation made...
-
Russell (age 50) and Linda (age 45) Long have brought you the following information regarding their income and expenses for the current year. Russell owns and operates a landscaping business called...
-
Rebecca and Walter Bunge have been married for 5 years. They live at 883 Scrub Brush Street, Apt. 52B, Las Vegas, NV 89125. Rebecca is a homemaker and Walt is a high school teacher. Rebecca's Social...
-
Consider the demand and supply curves in Exercise 13. DATA FROM EXERCISE13 Suppose that the domestic demand and supply for shoes in a small open economy are given by. where P denotes price and Q...
-
In the previous example, suppose that these are all of the entries in Freedonias BOP table. Calculate the value of errors and omissions. TABLE 11.2 Balance-of-Payments Example Merchandise exports...
-
Repeat Exercise 6 under the assumption that instead of a fall in demand for foreign exchange, there is an increase in supply. data from exercise 6 Credit entries in a countrys balance of payments...
Study smarter with the SolutionInn App