Answered: A family of total mass 195 kg sit on a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A family of total mass 195 kg sit on a rectangular wood raft made of 8 rectangular logs lashed together. Each log is 22 cm x 22 cm and has a length of 2.5 m. What is the distance from the horizontal top surface of the raft to the water level? [Density of water is 1 g/cm^3 and SG for wood log is 0.42]

Expert Solution

Step 1: Given data

A family of total mass 195 kg sit on a rectangular wood raft made of 8 rectangular logs lashed together. Each log is 22 cm x 22 cm and has a length of 2.5 m.

volume of each wood log v=0.22×0.22×2.5=0.121 m³

[Density of water is 1 g/cm^3 and SG for wood log is 0.42]

Mass of each wood log =specific gravity× density of water×volume=0.42×1000kg/m³×0.121=50.82 kg

Mass of 8 wood log =8×50.82=406.56 kg

Net total mass of wood and family=M =195+406.56=601.56 kg

Base area of 8 wood logs = 8×(0.22×2.5)=4.4 m²

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