4 years ago

Which may result from an increase in friction? Check all that apply.

Physics

1 answer:

Yuri [45]4 years ago

4 0

I am sure that the answer increased traction. :D

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A uniform solid sphere with a mass of M = 390 grams and a radius R = 19.0 cm is rolling without slipping on a horizontal surface

harina [27]

Answer:

l = 4.33 m

Explanation:

given,

mass of solid sphere = 390 gram = 0.39 kg

radius = R = 19 cm = 0.19 m

rolling with constant speed = 4 m/s

angle with horizontal = 15°

acceleration due to gravity = 10 m/s²

using energy conservation

$\dfrac{1}{2}I\omega^2 + \dfrac{1}{2}mv^2 = mgh$

I for sphere

$I = \dfrac{2}{5}mr^2$ v = r ω

$\dfrac{1}{2}\ \dfrac{2}{5}mr^2\times \dfrac{v^2}{r^2} + \dfrac{1}{2}mv^2 = mgh$

$\dfrac{7}{10}mv^2 = mgh$

$h = \dfrac{0.7 v^2}{g}$

$h = \dfrac{0.7\times 4^2}{10}$

h = 1.12 m

$l=\dfrac{h}{sin 15^0}$

$l=\dfrac{1.12}{sin 15^0}$

l = 4.33 m

the sphere will travel 4.33 m on the ramp.

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I think the answer is 3 and 4

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The angle of elevation to the top of the building at a distance of 50.0 m from its base is 60.0 degrees. find the height of the

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An outside force, Fo, brings two small metal spheres, A and B, at rest from a long distance away to a point where they are 1 met

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Answer:

The total work done by outside force is $W_{o}=0.294J$

The total work done by the electric field is $-W_{o} =-0.294J$

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The magnitude of the acceleration of sphere B is $a_{B} = 26.747 \ m/s^2$

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Explanation:

The explanation is shown on the first and second uploaded image

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