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
Triss [41]
3 years ago
11

La velocidad de un tren se reduce uniformemente de 12m/s a 5m/s. Sabiendo que durante ese tiempo recorre una distancia de 100 m.

calcular:
a) la aceleración .
b)l a distancia que recorre acontinuación hasta detenerse suponiendo la misma aceleración. ayuda porfa
Physics
1 answer:
KATRIN_1 [288]3 years ago
3 0

Responder:

Explicación:

Dados los siguientes datos

Valor inicial u = 12 m / s

velocidad final v = 5 m / s

Distancia S = 100 m

Necesario

aceleración del tren.

Usando la ecuación de movimiento

v² = u² + 2as

2as = v²-u²

a = v²-u² / 2s

Sustituyendo los valores dados para obtener la aceleración que tenemos;

a = 5²-12² / 2 (100)

a = 25-144 / 200

a = -119/200

a = -0,595 m / s²

Por tanto, la aceleración del tren durante este período es de -0,595 m / s²

b) Si el tren viaja a una parada desde 5 m / s, su velocidad final será cero y su velocidad inicial u será 5 m / s

Para obtener la distancia durante este período, sustituiremos u = 5 m / s, v = 0 m / sy a = -1,19 m / s² en la ecuación de movimiento anterior;

v² = u² + 2as

0² = 5²-2 (0.595) s

0 = 25-1,19 s

1,19 s = 25

s = 25 / 1,19

Responder:

Explicación:

Dados los siguientes datos

Valor inicial u = 12 m / s

velocidad final v = 5 m / s

Distancia S = 100 m

Necesario

aceleración del tren.

Usando la ecuación de movimiento

v² = u² + 2as

2as = v²-u²

a = v²-u² / 2s

Sustituyendo los valores dados para obtener la aceleración que tenemos;

a = 5²-12² / 2 (100)

a = 25-144 / 200

a = -119/200

a = -0,595 m / s²

Por tanto, la aceleración del tren durante este período es de -0,595 m / s²

b) Si el tren viaja a una parada desde 5 m / s, su velocidad final será cero y su velocidad inicial u será 5 m / s

Para obtener la distancia durante este período, sustituiremos u = 5 m / s, v = 0 m / sy a = -1,19 m / s² en la ecuación de movimiento anterior;

v² = u² + 2as

0² = 5²-2 (0.595) s

0 = 25-1,19 s

1,19 s = 25

s = 25 / 1,19

s = 21,0 m

Por lo tanto, la distancia que recorre hasta detenerse asumiendo la misma aceleración es 21.0 m

You might be interested in
The sun will become surrounded by glowing clouds of gas-forming what is called a planetary ____________.
allsm [11]
Hi!

the answer is, The sun will become surrounded by glowing clouds of gas-forming what is called a planetary nebula.

hope this helped!!

jazzy xx
5 0
3 years ago
Is centripetal acceleration always positive?
andrezito [222]
No. it can be zero acceleration
<span>
</span>
7 0
4 years ago
Four waves are described by the following equations, where distances are measured in meters and times in seconds. I. y = 0.12 co
marishachu [46]

Answer:

Wave 1 and Wave 2.      

Explanation:

We know that the general equation of a wave is given by :

y=A\ sin(kx-\omega t)    

or

y=A\ cos(kx-\omega t)    

We know that the speed of a wave is given by :

v=\dfrac{\omega}{k}

Where

\omega = angular speed

k = propagation constant

Wave 1.

y=0.12\ cos(3x-21t)

v_1=\dfrac{21}{3}=7\ m/s

Wave 2.

y=0.15\ cos(6x+42t)

v_2=\dfrac{42}{6}=7\ m/s

Wave 3.

y=0.13\ cos(6x+21t)

v_3=\dfrac{21}{6}=3.5\ m/s

Wave 4.

y=-0.23\ cos(3x-42t)

v_1=\dfrac{42}{3}=14\ m/s

It is clear that wave 1 and 2 have the same speed i.e. 7 m/s. Hence, this is the required solution.

5 0
4 years ago
A 100 kg box on the right and a 50 kg box on the left are tied together by a horizontal cable. The 100 kg box is acted upon by a
Marina CMI [18]
Im pretty sure its zero
8 0
4 years ago
1. Swordfish are capable of stunning output power for short bursts. A 650 kg swordfish has a cross-sectional area of 0.92 m2 and
Oksana_A [137]

Answer:

P_{sp}=178.4W/kg

Explanation:

From the question we are told that:

Mass of fish m_f=650kg

Cross-sectional area A=0.92 m^2

Drag coefficient of \mu= 0.0091

Seawater  density \rho= 1026 kg/m^3.

Speed of  Fish v=30 m/s  

Generally the equation for Drag force F_d is mathematically given by

F_d = \mu * \rho *A v^2 /2

F_d = 0.0091* 0.92* 1026* 30^2/2 \\F_d= 3865. 35 N  

Generally the equation for high speed  Power  P_{sp} is mathematically given by

P_{sp}=3865*35*\frac{v}{m_f}

P_{sp}=F_d*35*\frac{30}{650}

P_{sp}=178.4W/kg

5 0
3 years ago
Other questions:
  • Frank has a sample of steel that has a mass of 80 grams if the density is 8g/cm3 what is the volume
    9·1 answer
  • Fill in the blank
    5·1 answer
  • What is the force required to accelerate 1 kilogram of mass at 1 meter per second per second.
    8·1 answer
  • The pulse of sound hits a stationary object and is reflected back to the bat. The pulse is received by the bat 0.12s after it wa
    8·1 answer
  • Match these items. 1 . full moon a visible half-circle 2 . first-quarter moon darkest phase of the moon 3 . 13 degrees when the
    14·1 answer
  • According to Mendel's law of segregation, what takes place during meiosis?A.Pairs of alleles cross over on chromosomes, exchangi
    12·1 answer
  • How far is an object from a concave mirror if the image formed is real , enlarged , and inverted ?​
    12·1 answer
  • Which type of forces would be experienced by a sled that is being pulled by a rope (choose 4)
    14·1 answer
  • If a baseball's velocity is increased to four times its original velocity, by what factor does its kinetic energy increase
    15·1 answer
  • Ram and Ajay are trying to move a heavy box. Ram is applying 100N and Ajay is
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!