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maria [59]
3 years ago
13

whirl a rock at the end of a string and it follows a circular path. if the string breaks, the tendency of the rock is to

Physics
1 answer:
bixtya [17]3 years ago
8 0

Answer:

whirl a rock at the end of a string and it follows a circular path. if the string breaks, the tendency of the rock is to stop

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The question is incomplete. The complete question is :

A viscoelastic polymer that can be assumed to obey the Boltzmann superposition principle is subjected to the following deformation cycle. At a time, t = 0, a tensile stress of 20 MPa is applied instantaneously and maintained for 100 s. The stress is then removed at a rate of 0.2 MPa s−1 until the polymer is unloaded. If the creep compliance of the material is given by:

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Given t= 0,

σ = 20Mpa

Change in σ= 0.2Mpas^-1

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J(t) = Jo (1 - exp (-t/to))

J(t) = 3 (1 - exp (-0/100))= 3m^2/Gpa

a) t= 100s

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= 0.6 (-100)

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E(t)= Jσ (Jo) ∫t (t - Jo) dt

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