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Natasha_Volkova [10]
3 years ago
13

A disk between vertebrae in the spine is subjected to a shearing force of 425 N. Find its shear deformation, taking it to have a

shear modulus of 1.70×10^9 N/m^2. The disk is equivalent to a solid cylinder 0.700 cm high and 6.50 cm in diameter. a) 5.27 x 10^-7 m
b) 1.54 x 10^-6 m
c) 3.08 x 10^-6 m
d) 6.16 x 10^-6 m
Physics
1 answer:
zzz [600]3 years ago
3 0

Answer:

option A

Explanation:

given,

shear force = 425 N

Shear modulus = 1.7 × 10⁹ N/m²

disk equivalent to solid cylinder

height = 0.7 cm  and diameter = 6.50 cm

\delta = \dfrac{VL}{AG}\\\\\delta = \dfrac{425\times 0.007}{0.25 \times \pi d^2\times 1.7\times 10^9}\\\\\delta = \dfrac{425\times 0.007}{0.25 \times \pi\times 0.065^2\times 1.7\times 10^9}\\\\\delta  = 5.27 \times 10^{-7} m

hence, the correct answer is option A

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Two rods are made of brass and have the same length. The cross section of one of the rods is circular, with a diameter of 2a. Th
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Answer:

A. The one with the circular cross section will stretch more.

Explanation:

According to the given data:

Two rods are made of brass and have the same length

Both rods having circular and square cross-section

Diameter of circular cross-section given is 2 a

therefore, Cross-section = A_c=\frac{\pi (2a)^2}{4}=\pi a^2

If the length of square=2 a

then, Cross-section = A_{s} = (2a)²=>4a²

Change in Length of rod = PL / AE

δL\alpha \frac{1}{A}

Now, we are considering other factors same

the area of cross-section of square rod is more than Area of cross-section of circular rod

thus, the one with the circular cross section will stretch more

8 0
3 years ago
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8 0
3 years ago
if Steve throws the football 50 meters in 3 seconds, what is the average speed (velocity) of the football ?
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4 0
3 years ago
A driver slammed on her brakes and came to a stop with constant acceleration. Measurements on her tires and skid marks on the pa
IRISSAK [1]

Answer:

u = 29.22 m/s

Explanation:

distance (s) = 58.52 m

coefficient of kinetic friction (k) = 0.75

final velocity (v) = 0 m/s

acceleration due to gravity (g) = 9.8 m/s^{2}

How fast was she driving (u)

we can get how fast she was driving by using the formula below

s = ut - \frac{1}{2}.at^{2}  ...equation 1

where

  • s = distance
  • u = her initial velocity
  • a = acceleration = \frac{f}{m} = \frac{kmg}{m} = kg
  • k = coefficient of kinetic friction
  • g = acceleration due to gravity
  • t = time

        from v = u - at  (recall that v = 0)

        0 = u - at, therefore t = u/a = u/kg

now substituting the required values above into equation 1 we have

s = \frac{u^{2}}{kg} - \frac{u^{2}}{2kg}

s = \frac{u^{2}}{2kg}

u = \sqrt{2kgs}

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8 0
2 years ago
Determine the work done by the constant force. The locomotive of a freight train pulls its cars with a constant force of 15 tons
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Answer:

5.92×10⁷ J

Explanation:

We'll begin by converting 15 tons to Newton. This can be obtained as follow:

1 ton = 9806.65 N

Therefore,

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Next, we shall convert one-quarter (¼) or 0.25 mile to metre. This can be obtained as follow:

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0.25 mi = 0.25 mi × 160934 / 100 mi

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Finally, we shall determine the Workdone. This can be obtained as follow:

Force (F) = 147099.75 N

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Workdone (Wd) =?

Wd = F × d

Wd = 147099.75 × 402.335

Wd = 5.92×10⁷ J

Thus, the Workdone is 5.92×10⁷ J

5 0
2 years ago
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