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krok68 [10]
3 years ago
11

If the car passes point A with a speed of 20 m>s and begins to increase its speed at a constant rate of at = 0.5 m>s 2 , d

etermine the magnitude of the car’s acceleration when s = 101.68 m and x = 0.

Engineering
1 answer:
sattari [20]3 years ago
3 0

Answer:

a = 1.68m/S^{2}

Explanation:

Please kindly find the attached file for explanations

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A fatigue test was conducted in which the mean stress was 46.2 MPa and the stress amplitude was 219 MPa.
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Answer:

a)σ₁ = 265.2 MPa

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Explanation:

Given that

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Minimum stress level =σ₂

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\sigma_m=\dfrac{\sigma_1+\sigma_2}{2}

2\sigma_m={\sigma_1+\sigma_2}

2 x 46.2 =  σ₁ +  σ₂

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2  σ₁ = 530.4

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Stress\ ratio =\dfrac{\sigma_{min}}{\sigma_{max}}

Stress\ ratio =\dfrac{-172.8}{265.2}

Stress\ ratio =-0.65

Range = 265.2 MPa - ( -172.8 MPa)

Range = 438 MPa

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