An object with a mass of $3 k g$ $3 kg$ is on a plane with an incline of $- \frac{π}{8}$ $- pi/8$ . If it takes $15 N$ $15 N$ to start pushing the object down the plane and $2 N$ $2 N$ to keep pushing it, what are the coefficients of static and kinetic friction?

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An object with a mass of $3 k g$ $3 kg$ is on a plane with an incline of $- \frac{π}{8}$ $- pi/8$ . If it takes $15 N$ $15 N$ to start pushing the object down the plane and $2 N$ $2 N$ to keep pushing it, what are the coefficients of static and kinetic friction?

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Answer 1 · 2017-07-17T04:44:01

See below.

Explanation:

In case os static friction:
$μ_{s} m g cos θ = 15$ $mu_smgcostheta=15$
$\Rightarrow μ_{s} = \frac{15}{3 \times 10 \times 0.9}$ $=>mu_s=15/(3×10×0.9$
$\Rightarrow μ_{s} = 0.5$ $=>mu_s=0.5$
In case of kinetic friction:
$μ_{k} m g cos θ = 2$ $mu_kmgcostheta=2$
$μ_{k} = 0.07$ $mu_k=0.07$ (Ans)
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An object with a mass of $3 k g$ $3 kg$ is on a plane with an incline of $- \frac{π}{8}$ $- pi/8$ . If it takes $15 N$ $15 N$ to start pushing the object down the plane and $2 N$ $2 N$ to keep pushing it, what are the coefficients of static and kinetic friction?

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Explanation:

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An object with a mass of 3 kg3kg3 kg is on a plane with an incline of - pi/8 −π8 - pi/8 . If it takes 15 N15N15 N to start pushing the object down the plane and 2 N2N2 N to keep pushing it, what are the coefficients of static and kinetic friction?

1 Answer

Explanation:

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An object with a mass of $3 k g$ $3 kg$ is on a plane with an incline of $- \frac{π}{8}$ $- pi/8$ . If it takes $15 N$ $15 N$ to start pushing the object down the plane and $2 N$ $2 N$ to keep pushing it, what are the coefficients of static and kinetic friction?