posted by kely
Raft made of 2.2m long pine logs with Average diameter of logs 26cm.How many logs are needed to strap together to build raft to hold max 4 people?
Density of log = 600 kg/m^3
Each people weights 512N
What percent of the logs is under water when you are on your raft in the water with your friend?
find volume of each log.
Now, the bouyancy must equal the weight of logs + people.
let n be number of logs.
let volume V of logs=2PI*.13^2
solve for n. If it is decimal number, round UP.