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expeople1 [14]
3 years ago
5

An elevator (mass 4100 kg) is to be designed so that the maximum acceleration is 0.0400g. what is the maximum force the motor sh

ould exert on the supporting cable? incorrect: your answer is incorrect. n what is the minimum force the motor should exert on the supporting cable?
Physics
1 answer:
melomori [17]3 years ago
7 0

Answer:

The maximum force on the supporting cable is 80688 N.

The minimum force on the supporting cable is -164 N.

Explanation:

For maximum force movement of elevator is in upward direction. Thus, equation of motion is given by,

ma = T - mg

where m is the mass of elevator

a is acceleration of elevator

g is acceleration due to gravity

T is the maximum tension in the supporting cable

T = ma + mg

T = m (a + g)

T = 4100 ( 0.04g + 9.8)

T = 80688 N

This is the maximum force on the supporting cable.

For minimum force movement of elevator is in downward direction. Thus, equation of motion is given by,

ma = T - mg

where m is the mass of elevator

a= -0.04g is acceleration of elevator because elevator is moving downward

g is acceleration due to gravity

T is the minimum tension in the supporting cable

T = ma + mg

T = m (a + g)

T = 4100 ( 9.8 - 0.04g)

T = -164 N

This is the minimum force on the supporting cable.


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Answer:

The right solution is "126 Psi".

Explanation:

The given values are:

P₁ = 130 psig

i.e.,

   = 130\times 6.894

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or,

   = 896.22\times 10^3 \ Pa

Z₂ = 10ft

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\delta = 1000 kg/m³

According to the question,

Z₁ = 0

V₁ = V₂

As we know,

⇒  \frac{P_1}{\delta_g} +\frac{V_1^2}{2g} +Z_1=\frac{P_2}{\delta_g} +\frac{V_2^2}{2g} +Z_2

On substituting the values, we get

⇒  \frac{P_1}{\delta_g} +0+0=\frac{P_2}{\delta_g} +0+Z_2

⇒  \frac{896.22\times 10^3}{1000\times 9.8} =\frac{P_2}{1000\times 9.8} +3.05

⇒  P_2=866330 \ P_a

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A 65 kg student sits 3 m away from a 70 kg student. What is the magnitude of the gravitational force between the two students?
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Answer:

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Given that,

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Mass of student 2, m₂ = 70 kg

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We need to find the magnitude of the gravitational force between the two students. The formula for the magnitude of the gravitational force between two masses is given by :

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wlad13 [49]

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1 year ago
A typical car has 16 L of liquid coolant circulating at a temperature of 95 ∘C through the engine's cooling system. Assume that,
amm1812

Answer:

\Delta V=0.0592\ L

Explanation:

Given:

  • Initial temperature of the coolant, T_f=95^{\circ}C
  • final temperature of the coolant, T_f=105^{\circ}C
  • total volume of the coolant, V_c=16\ L
  • coefficient of volume expansion for coolant, \beta_c=410\times 10^{-6}\ ^{\circ}C^{-1}
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<u><em>We have:</em></u>

coefficient of volume expansion for Aluminium, \beta_a=75\times 10^{-6}\ ^{\circ}C^{-1}

coefficient of volume expansion for steel, \beta_a=35\times 10^{-6}\ ^{\circ}C^{-1}

<u>Now, change in volume of the coolant after temperature rises:</u>

\Delta V_c=V_c.\beta_c.\Delta T

\Delta V_c=16\times 410\times 10^{-6}\times (105-95)

\Delta V_c=0.0656\ L

<u>Now, volumetric expansion in Aluminium radiant:</u>

\Delta V_a=V_a.\beta_a.\Delta T

\Delta V_a=2\times 75\times 10^{-6}\times (105-95)

\Delta V_a=0.0015\ L

<u>Now, volumetric expansion in steel radiant:</u>

\Delta V_s=V_s.\beta_s.\Delta T

\Delta V_s=14\times 35\times 10^{-6}\times (105-95)

\Delta V_s=0.0049\ L

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V_X=\Delta V_s+\Delta V_a

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\Delta V=0.0656-0.0064

\Delta V=0.0592\ L

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