a garage door 20 ft long and 10 ft high weighs 90 lbs. the hinges are 2 ft from the upper and lower sides respectively and the upper hinge carries the entire weighs of the door. find the reaction of the upper hinge.

a. Draw the free body diagram for barrel A and B. Can you solve for the unknowns in the FBDs? Explain. 75 Lbs B 100 Lbs 45 degrees B

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5. The figure below represents the anatomy of the lower limb when balanced on your toes and the body weight acts through the tibia. The Achilles Tendon makes an angle (0) of 8° with the vertical and for this foot x1 is 6.2 cm and x2 is 12.3 cm. Calf Muscle Tibia Achilles Tendon Calculate the tension (T) in the Achilles Tendon if a 70 kg man stands on the toes of both feet. Using the values in this example what is the mechanical advantage for this lever and describe what that means in terms of the efficiency of the lever.