# The assignment is to build a boat.

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## Description

The boat has to float if I up weights on it. It has to float until 499 g and sink at 500g. My boat doesn't sink at 500g. It sinks at 700. I will be adding counter weights on it.

I use wire to form the shape of a b arch and used aluminum foil to overlap it. There is a report I have to write according to the rubric attached. Please write it according to the rubric. If there is enough time, you can also suggest me what material I should use for counterweight. Write about torque, density and buoyancy too. Please only do it if you have a good understanding in these topics. Thank you.

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Students are required to design and build a boat that can hold a load of at least 400 g but sink with a load of 500 g. Along with their completed boat, students will submit a report explaining their boat design and the physics principles behind their design. They will be asked to define a system, identify and represent the internal and external forces on the system using a free body diagram, and carry out an analysis of the net force on the system. For each force, students will be required to identify the interaction between two objects that cause the force. All contact forces must be described in terms of interatomic electric forces and the buoyant force must also be related to the density of the water. The project will conclude with the submission of the report and an in-class test of the boat that the student designs and builds. (LOs: 1.E.1.1, 2.B.1.1, 3.A.2.1, 3.A.3.1, 3.A.3.3, 3.B.1.1, 3.B.1.2, 3.B.2.1, 3.C.4.2, 4.A.2.2) Learning Objectives: 1.E.1.1 The student is able to predict the densities, differences in densities, or changes in densities under different conditions for natural phenomena and design an investigation to verify the prediction 2.B.1.1 The student is able to apply F = mg to calculate the gravitational force on an object with mass m in a gravitational field of strength g in the context of the effects of a net force on objects and systems. 3.A.2.1 The student is able to represent forces in diagrams or mathematically using appropriately labeled vectors with magnitude, direction, and units during the analysis of a situation. 3.A.3.1 The student is able to analyze a scenario and make claims (develop arguments, justify assertions) about the forces exerted on an object by other objects for different types of forces or components of forces. 3.A.3.3 The student is able to describe a force as an interaction between two objects and identify both objects for any force. 3.B.1.1 The student is able to predict the motion of an object subject to forces exerted by several objects using an application of Newton’s second law in a variety of physical situations with acceleration in one dimension. 3.B.1.2 The student is able to design a plan to collect and analyze data for motion (static, constant, or accelerating) from force measurements and carry out an analysis to determine the relationship between the net force and the vector sum of the individual forces. 3.B.2.1 The student is able to create and use free-body diagrams to analyze physical situations to solve problems with motion qualitatively and quantitatively. 3.C.4.2 The student is able to explain contact forces (tension, friction, normal, buoyant, spring) as arising from interatomic electric forces and that they therefore have different directions 4.A.2.2 The student is able to evaluate using given data whether all the forces on a system or whether all the parts of a system have been identified Report Grading Rubric 5 Explanation Contains clear of Boat explanations in a Design logical manner that include the process of designing and executing the building of the boat. Free Body All forces and Diagram directions are correct and clearly labeled including what causes each force Physics Includes all Principles contact forces in terms of interatomic electric forces and the buoyant force related to the density of the water Analysis Clear, concise, all inclusive of the forces causing the boat to float and sink 4 Contains mostly clear explanations in a logical manner that include the process of designing and executing the building of the boat. Most forces and directions are correct and clearly labeled including what causes each force Includes most contact forces in terms of interatomic electric forces and the buoyant force related to the density of the water Clear, concise, all inclusive of the forces causing the boat to float or sink 3 Contains explanations that include the process of designing and executing the building of the boat. 2 0 Contains some No Report/No explanations about design stages the designing and executing the building of the boat but the reasoning is flawed or unclear. Some forces and directions are correct and clearly labeled including what causes each force Includes some contact forces in terms of interatomic electric forces and the buoyant force related to the density of the water Lackluster explanation of forces causing the boat to float and sink Some forces and directions are correct and labeled No Report/No FBD Includes few No Report contact forces in terms of interatomic electric forces and the buoyant force related to the density of the water Lackluster No Report/No explanation of analysis forces causing the boat to float or sink 5 Sinks at exactly 500 g 1 0 Buoyancy Almost, sinks at Doesn’t ± 75 g float at 400 g or never sinks Design Creative, neat, Creative, research Semi-creative Not creative, neat, Not creative or No boat research of design of design is very design, some research of design very neat. is very apparent. apparent research is shown is very apparent Shows a lack of Formal design in the design research and drawn. effort Principles of Construction Construction Demonstrates Demonstrates very No evidence of No Boat Construction demonstrates demonstrates good strength little strength and distribution of excellent strength good strength and and rigidity, semi- rigidity, poor weight/forces and rigidity, water- rigidity, water-tight water tight water-resistance in design or tight infrastructure infrastructure infrastructure infrastructure execution Construction Demonstrates Demonstrates Demonstrates Demonstrates Demonstrates No Boat Effort input in design and input in design and input in design some effort a lack of effort construction of construction of and construction however the design in design and boat (original boat (semi-original of boat (semiis not original and construction of design); used class design); used class original design); class time was not the boat time well time well used class time used well well Boat Grading Rubric Total Report: Total Boat: Grade 4 Almost, sinks at ± 10 g 3 Almost, sinks at ± 25 g 2 Almost, sinks at ±50 g
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## Explanation & Answer

Hello there, thank you for your pat...

### Review

Anonymous
This is great! Exactly what I wanted.

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