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Naddik [55]
3 years ago
6

4. The bar has cross-sectional area A and modulus of elasticity E. If an axial force F directed toward the right is applied at C

: (a) What is the normal stress in the part of the bar to the left of C? [15 pts] (b) What is the resulting displacement of the point C? [15 pts]
Physics
1 answer:
aniked [119]3 years ago
4 0

Answer:

a)  ΔL/L = F / (E A),  b)   L_{f} = L (1 + L F /(EA) )

Explanation:

Let's write the formula for Young's module

     E = P / (ΔL / L)

Let's rewrite the formula, to have the pressure alone

    P = E ΔL / L

The pressure is defined as

    P = F / A

Let's replace

   F / A = E ΔL / L

   F = E A ΔL / L

   ΔL / L = F / (E A)

b) To calculate the elongation we must have the variation of the length, so the length of the bar must be a fact. Let's clear

    ΔL = L [F / EA]

    L_{f} -L = L (F / EA)

    L_{f} = L + L (F / EA)

    L_{f} = L (1 + L (F / EA))

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Answer:

Option (c).

Explanation:

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The horizontal component of the projectile remains the same because there is no horizontal motion. Vertical component changes at every point.

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Ice is water in solid phase, in this phase, the particles are very close together and relatively in fixed positions.

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3 years ago
In a "worst-case" design scenario, a 2000 kg elevator with broken cables is falling at 4.00 m/s when it first contacts a cushion
Leno4ka [110]

Answer:

4 m/s²

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Force in down ward direction = 2000 x 9.8

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= 8000 N

Acceleration in upward direction

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Why do teachers give such hard questions? anyways hopefully your question will get answered! (btw i also need the points but yeah gl!!!)

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Need an answer asap please!
olya-2409 [2.1K]

Answer:

Z

Explanation:

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