Calculate the magnitude of the resultant joint force at L5/S1 joint for the stoop lift. The worker has a height of 1.8 meters and a mass of 84 kg. The box has a mass of 30 kg. - Assume that the back extensor muscles have a line of action parallel to and 5 cm posterior (on the back side) to the trunk. - Assume the hands are at the center of the box. - Use the following masses and COM locations to calculate the moment at the L5/S1 joint - Note: the body masses and COM positions for the parts of the body are not in kg or cm. They are % of the whole body mass/% away from L5/ S1 joint. You need to convert these percentages to kg and cm. - Only consider the FBD and forces for one arm. Assume each arm holds 15kg of the box weight

Calculate the magnitude of the resultant joint force at L5/S1 joint for the stoop lift. The worker has a height of 1.8 meters and a mass of 84 kg. The box has a mass of 30 kg. - Assume that the back extensor muscles have a line of action parallel to and 5 cm posterior (on the back side) to the trunk. - Assume the hands are at the center of the box. - Use the following masses and COM locations to calculate the moment at the L5/S1 joint - Note: the body masses and COM positions for the parts of the body are not in kg or cm. They are % of the whole body mass/% away from L5/ S1 joint. You need to convert these percentages to kg and cm. - Only consider the FBD and forces for one arm. Assume each arm holds 15kg of the box weight

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Description: Calculate the magnitude of the resultant joint forceat L5/S1 joint for the stoop lift. Theworker has a height of 1.8 meters and a mass of 84kg. The box has a mass of 30 kg.- Assume that the back extensor muscles have a lineof action parallel to and

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Calculate the magnitude of the resultant joint force
at L5/S1 joint for the stoop lift. The
worker has a height of 1.8 meters and a mass of 84
kg. The box has a mass of 30 kg.
- Assume that the back extensor muscles have a line
of action parallel to and 5 cm
posterior (on the back side) to the trunk.
- Assume the hands are at the center of the box.
- Use the following masses and COM locations to
calculate the moment at the L5/S1 joint
- Note: the body masses and COM positions for the
parts of the body are not in kg or cm.
They are % of the whole body mass/% away from L5/
S1 joint. You need to convert these
percentages to kg and cm.
- Only consider the FBD and forces for one arm.
Assume each arm holds 15kg of the box
weight

trunk
Length of the trunk is 0.52 m
Length of the upper arm is 0.33 m
Length of the forearm is 0.26 m
Upper arm
forearm
90 deg.
hand
Fm
% of body mass
43.5
2.7
5cm
1.6
negligible
Longitudinal COM position from
(% length from major joint)
43.1% away from shoulder
57.7% away from shoulder
45.7% away from elbow
negligible

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