What is the best material to make brakes?

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Edad: 7-12
Level: Grade 3
Idioma: English (en)
ID: 110045
19/04/2020
Country code: VN
Country: Vietnam
Asignatura: Science (1061951)
Tema principal: Forces: Friction (2010615)
From worksheet author:

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What is the best material to make brakes?

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