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Kaylis [27]
3 years ago
5

describe the relationship between the direction of the velocity vector and the direction of the acceleration for a body moving i

n a circle at coinstant speed
Physics
1 answer:
Xelga [282]3 years ago
7 0

Answer:

a = v²/r

Explanation:

The acceleration of a body moving in a circular path is known as the centripetal acceleration. This is the acceleration of a body that keeps the body within the circular path. It is written in terms of the linear velocity v and the radius of the circle of rotation as shown;

a = v²/r where

v is the linear velocity

r is the radius

a is the centripetal acceleration

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A viscoelastic polymer that can be assumed to obey the Boltzmann superposition principle is subjected to the following deformati
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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:

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

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b) the residual strain when stress falls to zero.

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a)-60GPA

b) 0

Explanation:

Given t= 0,

σ = 20Mpa

Change in σ= 0.2Mpas^-1

For creep compliance material,

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

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

a) t= 100s

E(t)= ΔσJ (t - Jo)

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= 0.6 (-100)

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E(t)= Jσ (Jo) ∫t (t - Jo) dt

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E(t) = 0

5 0
3 years ago
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