Leonardo da Vinci (1452-1519) is credited with being the first to perform quanti

Question

Leonardo da Vinci (1452-1519) is credited with being the first to perform quantitative experiments on friction, though his results weren't known until centuries later, due in part to the secret code (mirror writing) he used in his notebooks. Leonardo would place a block of wood on an inclined plane and measure the angle at which the block begins to slide. He reports that the coefficient of static friction was 0.28 his experiments.

At what angle did Leonardo's blocks begin to slide?

Express your answer using two significant figures.

Explanation / Answer

Force of gravity down the incline Fg = m*g*sin?
Force of friction up th incline Ff =

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