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bonufazy [111]
3 years ago
10

Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 60 N and that the pressured water provid

es a frictionless support. How long will it take her to rotate the sphere one time, starting from rest?
Physics
1 answer:
sergey [27]3 years ago
8 0

Answer:

25.06s

Explanation:

Remaining part of the question.

(A large stone sphere has a mass of 8200 kg and a radius of 90 cm and floats with nearly zero friction on a thin layer of pressurized water.)

Solution:

F = 60N

r = 90cm = 0.9m

M = 8200kg

Moment of inertia for a sphere (I) = ⅖mr²

I = ⅖ * m * r²

I = ⅖ * 8200 * (0.9)²

I = 0.4 * 8200 * 0.81

I = 2656.8 kgm²

Torque (T) = Iα

but T = Fr

Equating both equations,

Iα = Fr

α = Fr / I

α = (60 * 0.9) / 2656.8

α = 0.020rad/s²

The time it will take her to rotate the sphere,

Θ = w₀t + ½αt²

Angular displacement for one revolution is 2Π rads..

θ = 2π rads

2π = 0 + ½ * 0.02 * t²

(w₀ is equal to zero since sphere is at rest)

2π = ½ * 0.02 * t²

6.284 = 0.01 t²

t² =6.284 / 0.01

t² = 628.4

t = √(628.4)

t = 25.06s

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0 degrees

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When \theta=0 i.e. when two forces are parallel to each other,

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When \theta=90^{\circ} i.e. when two forces are parallel to each other,

F_R=\sqrt{F_1^2+F_2^2+F_1F_2\ cos(90)}

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When \theta=180^{\circ} i.e. when two forces are parallel to each other,

F_R=\sqrt{F_1^2+F_2^2+F_1F_2\ cos(180)}

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A bromine atom has an atomic number of 35 and an atomic mass of 80. What is the structure of this atom?
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In a large restaurant an average 60% customers ask for water with their meal. A random sample of 10 customers is selected. Find
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b)p(x

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Generally the equation for pmf p(x) is mathematically given by

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b)

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p(xg)

p(x

p(x

p(x

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d)

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