1. Calculating Buoyancy (# Pennies) Penny Barge Design
Mr. Yersak
Livingston High School
Technology & Design I

2. Dimension your vessel Length – Width - Height2” 4” 3”

3. Determine the Volume of the Barge2” 4” 3”
HOW TO:
LENGTH x WIDTH x HEIGHT = VOLUME
24 cu. in.

4. How many inches are there in a cubic foot?
1,728

5. Divide the Barge Volume by the # of cubic inches in a cubit foot
24 cu. in. / 1728 = .013 cubic feet 2” 4” 3”

6. The weight of water
64 pounds per cubic foot

7. Determine the pounds of water displaced by the barge.
HOW TO:
.013 cubic feet x 64 lbs. per c^3 ft.
=.832 pounds displaced

8. Determine the mass of the barge2” 4” 3”
Aprox. 100 Grams

9. Grams in a Pound?
1 pound = grams

10. Convert grams to pounds2” 4” 3”
.22 pounds
HOW TO:
100 / = .22 pounds

11. Subtract weight of barge from weight of displaced water to find penny load
HOW TO:
= .612 pounds of pennies

12. Convert penny load lbs. into mass:
HOW TO:
.612 x 453.6
= 277 grams of pennies

13. What is the mass of a penny?
2.78 grams

14. Estimated pennies the barge can hold.
HOW TO:
277 grams of pennies / 2.78 mass of pennies
= 99 pennies

15. THE HMS YERSAK  AFTER IT HIT NATHAN’S BOAT