calculating buoyancy (# pennies) penny barge design mr. yersak livingston high school technology...
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Calculating Buoyancy (# Pennies)
Penny Barge DesignMr. Yersak
Livingston High SchoolTechnology & Design I
Dimension your vesselLength – Width - Height
2”
4”
3”
Determine the Volume of the Barge
2”
4”
3”
HOW TO:• LENGTH x WIDTH x HEIGHT =
VOLUME24 cu. in.
How many inches are there in a cubic foot?
1,728
Divide the Barge Volume by the # of cubic inches in a
cubit foot
2”
4”
3”
24 cu. in. / 1728 = .013 cubic feet
The weight of water
64 pounds per cubic foot
Determine the pounds of water displaced by the
barge.
=.832 pounds displaced
HOW TO:• .013 cubic feet x 64 lbs. per
c^3 ft.
Determine the mass of the barge
2”
4”
3”Aprox. 100 Grams
Grams in a Pound?
1 pound = 453.6 grams
Convert grams to pounds
2”
4”
3”.22 pounds
HOW TO:• 100 / 453.6 = .22 pounds
Subtract weight of barge from weight of displaced water to
find penny load
HOW TO:• .832- .22
= .612 pounds of pennies
Convert penny load lbs. into mass:
HOW TO:• .612 x 453.6
= 277 grams of pennies
What is the mass of a penny?
2.78 grams
Estimated pennies the barge can hold.
HOW TO:• 277 grams of pennies / 2.78
mass of pennies
= 99 pennies
THE HMS YERSAK AFTER IT HIT NATHAN’S BOAT