For example, head extension is a good example of a first-class lever system. Here, neck and back muscles apply an force to move the head. The weight of the head it the load, and the fulcrum is the joint between the skull and the vertebrae.n a second-class lever, the load is located between the force and the fulcrum. A wheel barrow is great example of a second-class lever system. Here, the wheel is the fulcrum, or the pivot point, the weight is the load and lifting the handles applies the force to move the load.
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amazon prime pricing is increasing 25 percent but there are still ways to avoid paying $ 99 a year for free shipping amazon announced thursday that it will raise the price of its prime service from $ 79 to $ 99 per yearmazon competitor shoprunner jumped right in to the action following amazon s announcement by offering existing amazon prime members a complimentary one year membership of unlimited two day shipping for switching normally shoprunner members will pay a $ 79 annual membership fee and $ 8 95 per month for the service