Los muelles de un remolque están calibrados para soportar su peso, cuando se carga el remolque con 2100 kg, la fuerza ejercida es de 20580 N comprime los muelles de un remolque 5,5 cm a)Longitud que desciende el remolque si se carga con 28000 N b)Si ha descendido 4,2 cm la carga

Answers

Answer 1

Answer:

a) El remolque desciende 7.4 cm

b) La carga debe ser de 15715.6 N ó 1603.6 kg

Explanation:

Para los cálculos que involucren muelles, se aplica la Ley de Hooke, la cual relaciona el efecto de una Fuerza y el cambio de longitud que esta ejerce,  en un resorte de elasticidad dada.

Escrito en fórmula:

[tex]F=-k \cdot \Delta L[/tex]

Donde:

F es la fuerza ejercida

k es la constante elástica del muelle

ΔL es la variación de longitud del muelle

El problema indica que al cargar 2100 kg se ejerce una fuerza de 20580 N

Esto se corrobora con la 2da ley de Newton y asumiendo una aceleración de gravedad de 9.8 [tex]\frac{m}{s^{2} }[/tex]

[tex]F_{1} =m \cdot a\\F_{1}=2100kg \cdot 9.8\frac{m}{s^2}\\F_{1}=20580N[/tex]

Esta fuerza comprime o reduce la longitud del muelle en 5.5 cm. Usando estos datos en la Ley de Hooke, podemos obtener la constante elástica k:

[tex]F=-k \cdot \Delta L\\20580N=-k \cdot (-0.055m)\\\\k=\frac{20580N}{0.055m}\\k= 374181\frac{N}{m}[/tex]

Ahora ya tenemos los datos para resolver las preguntas:

a) Longitud que desciende el remolque si se carga con 28000 N

Aplicando directamente la formula de la Ley de Hooke:

[tex]F=-k \cdot \Delta L\\\Delta L=\frac{F}{-k} \\\Delta L= \frac{28000N}{-374181\frac{N}{m}} \\\Delta L=-0.074 m = -7.4cm[/tex]

b) Si ha descendido 4,2 cm la carga

En este caso debemos calcular la fuerza necesaria que haga descender el remolque 4.2cm. Nuevamente utilizando la Ley de Hooke con estos nuevos datos:

[tex]F=-k \cdot \Delta L\\F=-374181\frac{N}{m} \cdot (-0.042m)\\F=15715.6N[/tex]

Si queremos saber la carga en kilogramos:

[tex]F = m \cdot a\\m = \frac{F}{a} \\m = \frac{15715.6N}{9.8\frac{m}{s^2} }\\m= 1603.6 kg[/tex]


Related Questions

PLEASE HELP!

Formulate a conclusion about what happens to the pH of a substance when an
acid and base are mixed.

Answers

Answer:

They gon' hate me regardless, that's why I do what I do (what I do)

See me in person i'm flawless (I'm flawless girl), i might just snatch up your dude (hahahaha)

Explanation:

i just want to be....appreciated

Other Questions
If my current slope is 7 what is the perpendicular slope?A- -7B-7C- -1/7D- 1/7 Does anyone know the answer to this question delete temp or %temp% files in Windows 10 is safe and, can it help boost up your PC fps?yes or no Why is the First Amendments protection of personal freedoms to important? Solve the inequality A bakery is making apple pies and carrot cakes. Eachapple pie nets $5 profit. For each carrot cake, theymake $10 profit. Each pie take 4 hours to prepare and1.5 hours to bake. The carrot cakes take 0.5 hours toprepare and 0.5 hours to bake. The maximumpreparation time is 20 hours. The maximum bakingtime is 10 hours. How many pies and cakes should bemade to maximize profits? Point P is the center of the circle in the figure above. What is the value of x? what is the slope of the line shown in graph A. -2B. -1C. 1/-2D. 1/2 Read this paragraph from Introduction to Found Poetry.If you've ever played with a magnetic poetry kit, then you're familiar with found poetry. Words are borrowed, and yet the poem is unique. A successful found poem doesn't simply repeat information. Instead, the poet engages with the text and offers a new context, a contrary view, a fresh insight or lyrical and evocative writing. Just as plastic bottles can be recycled to make a chair, the source text is transformed into something completely different.In the excerpt from Introduction to Found Poetry, how does the author introduce the topic of found poetry?by showing how the art of found poetry grew out of items like magnetic poetry kitsby describing found poetry by comparing it with things that might be familiar to the readerby showing that using objects and ideas in creative ways is importantby describing how some found poetry is better than others Order the following numbers from least to greatest. -2, 1.7, -5/2 How did German and British soldiers interact during the Christmas Truce? Can whoever answers this give a full explanation of what numbers i'm supposed to put (screenshot is there) Can any one help WILL GIVE 30 POINTS hi can you help me plz write a word problem for 8x - 5 = 40 Each large rectangle below represents one whole.What percent is represented by the shaded area? 6. Slope =Y-InterceptEquation in slope-intercept form: At the bookstore, Tim bought a magazine for $4, and five books that all cost the same amount. He spent a total of $129. Which equation expresses how much each book cost? A pencil holder shaped like a triangular prisms height is 12 cm, and the volume of the pencil holder is 216 cm3. What is the area of the base of the pencil holder in square centimeters What was a major problem for most Oklahoma farmers that the Depression-era Agricultural Adjustment Administration(AAA) never addressed?A. Most Oklahoma farmers were tenant farmers, so they saw no profit from crop price gains.B. Although many crop prices increased nationwide, prices for Oklahoma's major crops stagnated.C. Due to the way Oklahoma's farm system was structured, profits benefited state governmentover individual farmers.D. The AAA lost the support of Oklahoma's state government, which refused to allow federalregulation over the state's farms.