Muscle

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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

A submarine robot explorer is used to explore the marine life in deep water. The weakest point in the submarine robot explorer structure can hold a pressure force of 300 MPa. What is the deepest point can it reach? *

Those answers are not correct for this question what is the correct answer ??

B. 2 m Fg = 600 N 3.5 m 0.5 m Fc= 450 N 1.5 m 1 m 0.5 m 1.5 m

Which choice below best describes the mechanical property of materials called toughness?    a. Ability to compress without permanent deformation   b. Ability to bend in the elastic range   c. How much energy a material can absorb without breaking   d. Indentation resistance

1. How will the date code be applied to the assembly? 2. What paper size is the original version of the print? 3. What is the scale of the original drawing? Thank you, ill be posting more if you are good with engineering please check again soon.

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A thermoformed disc ending at a diameter of 2 cm and a thickness of 1 cm started from a disc with a diameter of 1 cm. What was the original thickness? 1 cm 2 cm 3 cm 4 cm O not enough info

topic: rigid bodies

known. Using simple measurement tools, the following features are measured. A spring is known to be made from music wire, ASTM A228 steel, however no other data are Free length of the spring was 44.45 mm. Outside Diameter was 14.25 mm Wire diameter was 1.4 mm The ends are squared and ground The total number of coils was 10.0 This spring will be used in an application where the normal operating load is to be 62.28 N. (Take 1 inch = 25.4 mm) a) Determine the inside diameter, spring index and Wahl factor. b) Determine the expected stress at this operating load. c) Determine the spring deflection at the normal operating load. d) Determine the operating length, solid length and the spring rate. e) Determine the coil clearance and check the spring against buckling. Datermine the minimum hole diameter for the spring to operate in.

A helical compression spring is to be made of a steel wire. If the coil diameter is limited to 12 mm and a spring index of 6.4 is chosen. From the following wire size chart, determine the correct gauge size of an off-the-shelf spring wire to be used. [gauge] BAS GAUGE INCH MILLIMETER 162 4.12 3.25 mm poups 2.39mm 10 gange 081 2.06mm 064 1.63mm 16 CST" 1.29 mm DAY 1.02 813 635 mm 24 P 508 mm 20 gange OM OXY 330 254 X 14

Im not sure how ro go about this, can you help me figure out these answers or how to get these answers?