# A free falling block b a block under water and c a

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a free falling block , (b) a block under water , and (c) a floating wood block . ( Note : Use Insert>Shapes and arrows to draw the free body diagrams on the figures at the right) 3. In which figure(s) is the block accelerating? 4 pts Block 1 4. What should be the net force in the vertical direction when the block is floating ? 4 pts 0 N The %-Density Ratio Trick 5. Estimate the percentage of the wood, ice, and Styrofoam block that is under water while those blocks are floating. Remember: the density of water is 1.00 kg/L 12 pts 6. Compare your estimations to the densities shown on the chart. Place those densities in the chart above. 7. Create a formula to show how much of a floating object would be submerged in any fluid. 10 pts Calculating Density Page 1 of 3 Density of Wood Density of Ice Density of Styrofoam 0.4 kg/L 0.92 kg/L 0.15 kg/L % Wood under water % Ice under water % Styrofoam under water 40% 92% 15% 1 2 3
Using the simulation each scenario listed in the box at the right, complete the tables below. You should be able to estimate the % submerged to within 5%. Try hard . Table 1 Same Mass 11 pts Block % submerged Mass, kg Volume, L Density, kg/L Blue 5.00 kg 5 L 1 kg/L Yellow 5.00 kg 10 L 0.5 kg/L Green 5.00 kg 2.5 L 2 kg/L Red Sunk / 100% 5.00 kg 1.25 L 4 kg/L Table 2 Same Volume 8 pts Block % submerged