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Require physics help
shorthair:
You said what you'd like to do. What is the verbal presentation for?
SirPeale:
If you can't dazzle them with brilliance, baffle them with ---That which is odiferous and causeth plants to grow---. Make something really complicated up. Go into all those details (weight of rower, air density, etc). Betcha get an A.
danny_galaga:
--- Quote from: USSEnterprise on May 12, 2007, 11:56:26 am ---One of the few extracurricular activities I am involved in at school is the Cardboard Canoe team. This involves competing in a series of races against other cardboard canoes. The first part of the competition is based on a 3 minute verbal and visual presentation (no powerpoint allowed.) I would like to, for this presentation, to find out how fast our boat is capable of going, based on the mass of the loaded boat, the mass of the paddle, and the amount of force being exerted on the water by the paddle. My estimates for these are:
mass of boat: 135kg
Mass of paddle: 5kg
Force being exerted on water: Approx 20 lbs or about 90N per stroke
There is only one paddler per boat, with a single, double sided paddle.
--- End quote ---
the mass of the paddle doesnt really matter. at least not as much as the surface area of the part of the paddle actually doing the work. dont know much about hydrodynamics, but you will definitely have to know how much drag there is. the drag is exponential. this is how it looks for air pressure: dynamic pressure = 1/2rho V squared. same kind of thing as kinetic energy= 1/2M V squared.
missioncontrol:
so if canoe A is leaving the docks at 8:45 and paddling 45 strokes per minute and canoe B which is 4 miles downstream leaves the docks at 10:17 and paddling at 28 strokes per minute, what time do they eat lunch?
USSEnterprise:
The answer is 42
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