1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shepuryov [24]
3 years ago
5

If the elevator cable breaks when the elevator is at a height h above the top of the spring, calculate the value that the spring

constant k should have so that passengers undergo an acceleration of no more than 7.0 g when brought to rest. Let M be the total mass of the elevator and passengers.
Physics
1 answer:
lawyer [7]3 years ago
4 0

Answer:

k=\frac{24Mg}{h}

Explanation:

We have to know the maximum compression of the spring in order to know the total height at which the elevator falls. According to Newton's second law:

\sum F=ma\\kx-Mg=M(7g)\\kx=8Mg\\x=\frac{8Mg}{k}

The law of the conservation of energy states that:

MgH=\frac{kx^2}{2}\\Mg(h+x)=\frac{k(\frac{8Mg}{k})^2}{2}\\Mgh+Mg(\frac{8Mg}{k})=\frac{64M^2g^2}{2k}\\Mgh=\frac{32M^2g^2}{k}-\frac{8M^2g^2}{k}\\k(Mgh)=24M^2g^2\\k=\frac{24Mg}{h}

You might be interested in
How do energy transformations occur in a hydroelectric plant?
Tresset [83]
Energy transformation occurs in a hydroelectric plant by converting the energy of water into electricity.

6 0
3 years ago
Read 2 more answers
Define mixture, heterogeneous, homogeneous, solution, colloid, suspension, solvent, solute, saturation.( please don't answer the
oksano4ka [1.4K]

Answer:

1) a substance made by mixing other substances together.

2) diverse in character or content.

3) of the same kind; alike.

4) a means of solving a problem or dealing with a difficult situation.

5) a homogeneous noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

4 0
2 years ago
Read 2 more answers
A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon
nirvana33 [79]
It gets larger because
well let me give you an example
so today in class we looked at a lava lamp with wax inside and there was a lightbulb at the bottom.
we watched as the wax floated up because the molecules inside the wax spreads out and makes the wax less dense.
the wax floats up because (which is related to the balloon getting bigger) the wax is getting less dense and the particles get bigger which ALSO makes the wax less dense.
hope this helps and hope you can relate it to your problem! say thanks if I did help AT ALL! :)
7 0
3 years ago
Read 2 more answers
Which of the following is not true of a form?
Ludmilka [50]

Answer:

It can only display one record at a time

Explanation:

Form ;

1. This is a document with spaces (also called  placeholders or fields ) in which a series of documents with similar content can be written or selected.

2.This is the most popular method of data entry

3.It may contain images in the background.

4.This can be sorted data regardless of its source of information.

Only option C is wrong.

Therefore the answer C is correct.

4 0
3 years ago
El dormitorio de Pablo es rectangular, y sus lados miden 3 y 4 metros. Ha decidido dividirlo en dos partes triangulares con una
Paraphin [41]

Answer:

 c = 5 m

Explanation:

this exercise you want to divide the rectangular room into two triangular rooms

                 

the area of ​​triangles is

           A = ½ base height

           A = ½ 4 3

          A = 6 m²

the length of the curtain can be found using the Pythagorean theorem

           c² = b² + a²

           c = √ (4² + 3²)

           c = 5 m

this is the length of the curtain

5 0
3 years ago
Other questions:
  • 9. A child standing on a bus remains still when the bus is at rest. When the bus moves forward and then slows down, the child co
    12·1 answer
  • In the seventeenth century, astronomer Johannes Kepler observed the planets revolving around our sun and analyzed data about the
    15·1 answer
  • Ultraviolent radiation is one of many types of energy that comes to Earth from the Sun.
    15·2 answers
  • Describe what causes the flow of electric current. (4 points)
    5·1 answer
  • An astronaut takes an iPod onto the space shuttle. An identical iPod remains on Earth. Which statement about the pull of Earth's
    13·1 answer
  • Which of the following is an example of mechanical waves in nature?
    8·1 answer
  • A mass of 100 grams of a particular radioactive substance decays according to the function m(t)=100e−t850
    13·1 answer
  • Find the frequency of a spring block system if it is doing 4 oscillation in 100s
    7·1 answer
  • What is part of a line has one endpoint and continues in one direction?
    15·1 answer
  • What does gravity determine?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!