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Simora [160]
4 years ago
12

Determine the velocity of the 60-lb block A if the two blocks are released from rest and the 40-lb block B moves 2 ft up the inc

line. The coefficient of kinetic friction between both blocks and the inclined planes is μk=0.10.

Engineering
1 answer:
Otrada [13]4 years ago
5 0

vₐ = 0.771 ft/s

vb = -1.54 ft/s

<u />

<u>Explanation:</u>

<u />

Block A:

F = ma

Nₐ = - 60 cos60° = 0

Nₐ = 30 lb

Fₐ = 0.1 X 30 = 3lb

Block B:

F = ma

Nb = - 40 cos30° = 0

Nb = 34.64lb

Fb = 0.1 X 34.64 = 3.464lb

T1 + ∑U = T2

(0 + 0) + 60 sin 60° |Δsₐ| - 40 sin 30° |Δsb| - 3|Δsₐ| - 3.464 |Δsb|

= 1/2 (60/32.2) vₐ² + 1/2 (40/32.2) vb²

and

2vₐ = - vb

On solving, we get

vₐ = 0.771 ft/s

vb = -1.54 ft/s

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Dominik [7]

Answer:

Cc= 12.7 lb.sec/ft

Explanation:

Given that

m = 22 lb

g= 32 ft/s²

m = \dfrac{22}{32}=0.6875\ s^2/ft

x= 4.5 in

1 in = 0.083 ft

x= 0.375 ft

Spring constant ,K

K=\dfrac{m}{x}=\dfrac{22}{0.375}

K= 58.66  lb/ft

The damper coefficient for critically damped system

C_c=2\sqrt{mK}

C_c=2\sqrt{0.6875\times 58.66}

Cc= 12.7 lb.sec/ft

5 0
3 years ago
What is the difference between filler and electrode in Welding? Can a filler be an electrode? Can an electrode be a filler? Why?
Vlada [557]

Explanation:

<u>Filler:</u>

  Filler is the material rod is used when we are joining two material by using welding process.If thickness of work piece is more so it will become compulsory to provide some filler material for making the welding join to withstand high stresses.

<u>Electrode:</u>

  Electrode is the element which is used to complete the electric circuit in welding .Some time electrode is connected with positive terminal and some time with negative terminal ,it depends on the requirement of welding process.In Tungsten inert gas welding electrode is connected negative terminal but on the other hand Metal inert gas welding electrode is connected with positive terminal.Electrode can be consumable non-consumable depends on the condition.

Yes electrode can be work as filler material ,in Metal inert gas welding wire is used as electrode as well as filler material.In Metal inert gas welding consumable electrode is used on the other hand Tungsten inert gas welding non-consumable electrode is used.In Tungsten inert gas welding if thickness of work pieces is less than 5 mm then no need to used any filler material but if thickness is more than 5 mm then we have to use filler material.

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7 0
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Answer:

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Explanation:

specific gravity of fluid A = 1.65

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<u>Calculate the kinematic viscosity of Fluid A </u>

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Pa = Pw * Specific gravity =  1000 * 1.65 = 1650 kg/m^3

next : convert dynamic viscosity to kg/m-s

210 centipoise = 0.21 kg/m-s

Kinetic viscosity of Fluid A = dynamic viscosity / density of fluid A

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