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Back injuries are very common in humans and are often caused by lifting objects with the...

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Mechanical Engineering

Back injuries are very common in humans and are often caused bylifting objects with the legs straight while leaning over; alsoknown as “lifting with the back.” Use the concepts learned in thislab to explain why one should “lift with the legs” rather than withthe back. Make sure to discuss the forces and torques involved, andhow they differ in the two lifting techniques.

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4.5 Ratings (966 Votes)
Using our back to lift would consist of a class 3 lever because the weight would be targeted at the far end and the back muscles would be closer to the center of mass Lifting with our legs would be considered a class 2 lever with the weight being targeted closer to the center of mass Because a class 3 lever requires much more muscle force to counter the weight force it    See Answer
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