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A wheelbarrow is a second class lever. In a second class lever, the pivot point is at one end (the wheel), the effort force is at the opposite end (your hands on handles) and the resistive force (load) is in between the two.
The load center of a forklift vehicle has little to do with its lifting capacity; this is determined by its structural engineering including the counterweight and pivot point. The lifting capacity of all forklift vehicles is stated on a tag on the vehicle, and is available from the manufacturer, and is also stated in the operation and safety procedures for the specific vehicle. The load center only tells you where you can place the load on the forks.
Load * Distance ., will act on the CG
Stress testing means increasing the load ,and cheking the performance at each level. Load testing means at a time giving more load by the expectation and checking the performance at that leval. Volume testing means first we have to apply initial load,then at certain time increase the load and check the performance.
It will be accurate at any range- however, I think you mean at what range will the point of aim and point of impact be the same. It will vary depending on the cartridge you use, barrel length, and scope height- BUT- assuming an average 30-06 load, with a scoped rifle, a 35 yard zero will have point of impact meeting point of aim at ABOUT 200 yards.