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Consider a group of people trying to stay afloat after
Chapter 11, Problem 86(choose chapter or problem)
Problem 86PE
Consider a group of people trying to stay afloat after their boat strikes a log in a lake. Construct a problem in which you calculate the number of people that can cling to the log and keep their heads out of the water. Among the variables to be considered are the size and density of the log, and what is needed to keep a person’s head and arms above water without swimming or treading water.
Questions & Answers
QUESTION:
Problem 86PE
Consider a group of people trying to stay afloat after their boat strikes a log in a lake. Construct a problem in which you calculate the number of people that can cling to the log and keep their heads out of the water. Among the variables to be considered are the size and density of the log, and what is needed to keep a person’s head and arms above water without swimming or treading water.
ANSWER:
Solution 86PE
The buoyant force applied by the water will be equal to the weight of the people’s submerged body and the weight of the log.
Step 1 of 4
Let there are people.
Average density of human body kg/m3
Let the mass of each person be kg
Therefore, total weight of the people
Assume that 95% of each person’s body is submerged in water.
Therefore, the weight of the people submerged is