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I designed a ramp to go from a boat dock into the water, allowing our dog to exit the water. I've done some rough calculations to estimate how large of a buoy I need underneath my ramp, and am missing only one variable at this point. I have accounted for the "live weight" which includes our dog on the ramp. I know exactly how much our dog weighs, but am curious what sort of maximum load the ramp might experience considering our dog would be moving and accelerating the ramp as he climbs out. So I have two questions:

1) What is a reasonable estimate for the maximum load my dog would place on the ramp while climbing out in terms of his weight. For example, 1.5 times his weight, 2 times his weight, etc.

2) My second question is essentially the same as the first, except I am looking for an approximate physics explanation of how I could reasonably estimate this force. I assume this activity would be hard to pin down exactly and how be extremely dynamic, but a first order approximation is fine!

Thanks for any help!