"Provide calculations to show the force and pressure required to lift the weight of each draw bridge (or the load that is on the bridge)"
A syringe is used as the hydraulic system which is pushed (via the plunger) to draw up the bascule and pulled back to draw the bascule back to its original position.
The area of the syringe used to push liquid (or air), in this case, is 5.65cm^2, and the area of the bascule which the syringe needs to push liquid to, to lift, is 238cm^2 (17cm by 14cm by 0.12cm).
So we have:
Area of bascules: 238cm^2 (unfortunately, there is no weight provided for the bascules)
Area of plunger (back of syringe which can pull and push): 5.65cm^2
Weight of the entire bridge (including towers): 200g
Weight of the load that the bridge is able to carry: 2000g (per bascule) * 2 = 4000g altogether
Speed of gravity/earth's downward acceleration: 9.8m/s^2
Unfortunately, we are not also given the mass of the object. Is there any way to calculate the force and pressure needed to lift 4000g of weight with this information? I'm also aware of the Pascal's Principle, but am not sure how to use it without the force. Any help is appreciated, thanks.
2 answers