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algol13
2 years ago
11

Leonardo da Vinci (1452-1519) is credited with being the first to perform quantitative experiments on friction, though his resul

ts 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 0.22 his experiments.
At what angle did Leonardo’s blocks begin to slide?
Physics
2 answers:
Natalka [10]2 years ago
6 0

Answer:

Pog

Explanation:

Harrizon [31]2 years ago
6 0

Answer:

θ = 12.4° from horizontal

Explanation:

μ = F parallel / F Normal = mgsinθ / mgcosθ = tanθ

0.22 = tanθ

θ = 12.407418...

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A 3.00-kg model airplane has velocity components of 5.00 m/s due east and 8.00 m/s due north. What is the plane’s kinetic energy
GalinKa [24]

Answer:

Kinetic energy, E = 133.38 Joules

Explanation:

It is given that,

Mass of the model airplane, m = 3 kg

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Let v is the resultant of velocity. It is given by :

v=\sqrt{v_1^2+v_2^2}

v=\sqrt{5^2+8^2}=9.43\ m/s

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E=\dfrac{1}{2}mv^2

E=\dfrac{1}{2}\times 3\ kg\times (9.43\ m/s)^2

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2 years ago
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Mrac [35]
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2 years ago
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Doss [256]

Answer:

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2 years ago
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Semmy [17]
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