How many tanks can a 150 ft. barge carry without sinking more than 1 ft?

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SUMMARY

The discussion focuses on calculating the maximum number of 10-ton light tanks a 150 ft. by 30 ft. barge can carry without sinking more than 1 ft. The buoyant force is calculated using the formula: Buoyant Force = fluid density x volume submerged x gravity, resulting in a buoyant force of 1,248,779.7 N. Each light tank weighs 88,964.4 N, allowing for a straightforward calculation of the maximum number of tanks by dividing the buoyant force by the weight of one tank. The conclusion is that the total weight of the tanks must not exceed the calculated buoyant force to ensure the barge remains afloat.

PREREQUISITES
  • Understanding of buoyancy principles and Archimedes' principle
  • Familiarity with basic physics equations involving force and weight
  • Knowledge of unit conversions, particularly between metric and imperial systems
  • Ability to perform calculations involving volume and density
NEXT STEPS
  • Calculate the maximum number of tanks using the formula: Number of Tanks = Buoyant Force / Weight of One Tank
  • Explore the implications of different payload weights on buoyancy
  • Research the effects of barge dimensions on stability and buoyancy
  • Learn about the principles of naval architecture related to cargo loading
USEFUL FOR

Students in physics or engineering, naval architects, and anyone involved in logistics and cargo management on watercraft will benefit from this discussion.

NYCHE89
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Homework Statement


A barge 150 ft. long and 30 ft. wide is to carry a payload of 10-ton light tanks over water. If the barge is to sink no more than an addictional 1 ft, how many tanks can be loaded?


Homework Equations





The Attempt at a Solution



Buoyant Force = fluid density x volume submerged x gravity
= (1 g/cm^3 x 1kg/1000g) x (4500 ft^3 x 28.317L/1ft^3 x 1000cm^3/1L) x 9.8 m/s^2
= 1,248,779.7 N

I've gotten this far and don't know what to do next. Also, this may be completely wrong.
 
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It might be easier to restate this as: "It receives an upthrust equal to the weight of water displaced."
Or the extra weight of cargo equals the weight of the water.
There no need to explicitly include g - especially if you can't decide which units to use.
 
NYCHE89: Nice work! Your equation and answer for buoyancy force, Fb, is correct. g = 9.807 m/s^2. Now, the weight of each light tank is Pt = 88 964.4 N. Therefore, see if you can now figure out how many light tanks would have a total weight not exceeding Fb. Try it.
 

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