You are trying to evaluate the amount of force a worker must exert and see if implementing an assistive device would help reduce injury for the work. Pictured below, the worker and the job you are assessing. You are interested in the shoulder joint for this problem. • The drill weighs 3.1 kg and is 80 cm away (horizontal distance) from the shoulder joint • The worker's arm weighs 17 lbs from the shoulder to the fingers. The center of mass of this weight is 40cm from the shoulder joint. Show the units. 1. Draw a FBD for the right arm only. a. Assume the drill is not touching the wall. b. Assume the worker is not supporting themselves on anything c. Assume the deltoid muscle is holding up the drill. The deltoid muscle is pointing towards the shoulder joint and runs parallel to the arm but 2 cm above the shoulder joint Also, calculate the deltoid muscle force. Is the muscle for pointing towards the shoulder or away from the shoulder?

You are trying to evaluate the amount of force a worker must exert and see if implementing an assistive device would help reduce injury for the work. Pictured below, the worker and the job you are assessing. You are interested in the shoulder joint for this problem. • The drill weighs 3.1 kg and is 80 cm away (horizontal distance) from the shoulder joint • The worker's arm weighs 17 lbs from the shoulder to the fingers. The center of mass of this weight is 40cm from the shoulder joint. Show the units. 1. Draw a FBD for the right arm only. a. Assume the drill is not touching the wall. b. Assume the worker is not supporting themselves on anything c. Assume the deltoid muscle is holding up the drill. The deltoid muscle is pointing towards the shoulder joint and runs parallel to the arm but 2 cm above the shoulder joint Also, calculate the deltoid muscle force. Is the muscle for pointing towards the shoulder or away from the shoulder?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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You are trying to evaluate the amount of force a
worker must exert and see if implementing an
assistive device would help reduce injury for the
work. Pictured below,
the worker and the job you are assessing. You are
interested in the shoulder joint for this
problem.
● The drill weighs 3.1 kg and is 80 cm away
(horizontal distance) from the shoulder joint
● The worker's arm weighs 17 lbs from the shoulder
to the fingers. The center of mass of this weight is
40cm from the shoulder joint. Show the units.
1. Draw a FBD for the right arm only.
a. Assume the drill is not touching the wall.
b. Assume the worker is not supporting themselves
on anything
c. Assume the deltoid muscle is holding up the drill.
The deltoid muscle is pointing towards the shoulder
joint and runs parallel to the arm but 2 cm above the
shoulder joint
Also, calculate the deltoid muscle force. Is the
muscle for pointing towards the shoulder or away
from the shoulder?

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