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
kifflom [539]
3 years ago
14

Un coche que lleva una velocidad constante de 90 km/hora durante 2 horas ¿Cuánto espacio recorre?Si encuentra un obstáculo en la

carrera y tiene que parar 10 segundos calcula la aceleración
Physics
1 answer:
Kisachek [45]3 years ago
4 0

Answer:

(i) El coche recorre 180 kilómetros.

(ii) El coche decelera a razón de 2.5 metros por segundo al cuadrado.

Explanation:

El problema se divide en dos partes. La primera es el coche viajando a velocidad constante y la segunda consiste en una decelaración hasta alcanzar el reposo.

Primera parte - Viaje a velocidad constante

La distancia recorrida por el coche se calcula mediante la siguiente ecuación cinemática:

x = v\cdot t (1)

Donde:

x - Distancia recorrida, en kilómetros.

v - Velocidad, en kilómetros por hora.

t - Tiempo, en horas.

Si sabemos que v = 90\,\frac{km}{h} y t = 2\,h, entonces la distancia recorrida por el coche es:

x = v\cdot t

x = 180\,km

El coche recorre 180 kilómetros.

Segunda parte - Deceleración

Asumiendo que la deceleración del coche es constante, se determina mediante la siguiente ecuación cinemática:

a = \frac{v-v_{o}}{t} (2)

Donde:

v_{o} - Velocidad inicial, en metros por segundo.

v - Velocidad final, en metros por segundo.

t - Tiempo, en segundos.

Si sabemos que v_{o} = 25\,\frac{m}{s}, v = 0\,\frac{m}{s} y t = 10\,s, entonces la deceleración experimentada por el coche es:

a = -2.5\,\frac{m}{s^{2}}

El coche decelera a razón de 2.5 metros por segundo al cuadrado.

You might be interested in
Explain the process that causes dew to form on blades of grass?
luda_lava [24]
<span>Heat is radiated, atmospheric moisture condenses at a rate greater than that at which it can evaporate, resulting in the formation of water droplets.</span>
7 0
2 years ago
Read 2 more answers
Why does friction cause a spinning stop to eventually stop?
Genrish500 [490]
Mechanical Energy transforms into Thermal due to the moving parts rubbing on eachother creating heat and friction.
7 0
3 years ago
A pendulum Bob released from some initial height such that the speed of the bob at the bottom of the swing is 1.9m/s. What is th
Dmitriy789 [7]

Answer:

h = 18.4 cm

Explanation:

Given that,

The speed of the bob at the bottom of the swing is 1.9m/s.

We need to find the initial height of the bob. Let it is h.

We can find it using the conservation of energy i.e.

mgh=\dfrac{1}{2}mv^2

Where

v is speed of the bob

So,

h=\dfrac{v^2}{2g}\\\\h=\dfrac{(1.9)^2}{2\times 9.8}\\\\h= 0.184\ m

or

h = 18.4 cm

So, the initial height of the bob is 18.4 cm.

8 0
2 years ago
A normal atom is electronically ** (positive/negative/neutral) because the number of ** (protons/neutrons/electrons), each with
ra1l [238]

Answer:

(neutral)

(protons)

(electrons)

Explanation:

Electrons have a negative charge (-) while protons have a positive (+) charge.

Atoms will usually be neutral, which means that there will be no charge.

For an atom to have a neutral charge, protons and electrons must "cancel" each other out. For this to happen, you need to have the same amount of each.

Positive will "cancel" out the negative.

4 0
2 years ago
True or false static is weightless colorless and odorless​
V125BC [204]

Answer:

True.

Explanation:

5 0
3 years ago
Other questions:
  • Atoms of the same element that have the same number of protons but different numbers of neutrons are called_____
    14·1 answer
  • The driver must stop and remain stopped to let a pedestrian cross at a crosswalk when the pedestrian is _____________.
    9·2 answers
  • The discussion of the electric field between two parallel conducting plates, in this module states that edge effects are less im
    12·1 answer
  • On a frictionless horizontal air table, puck A (with mass 0.254 kg ) is moving toward puck B (with mass 0.367 kg ), which is ini
    15·1 answer
  • Which SI unit is the correctly abbreviated for describing the mass on an object.
    12·1 answer
  • The Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the
    6·1 answer
  • A 5.8 kg bowling ball is rolling down the lane with a velocity of 8.1 m/s . Calculate the momentum of the bowling ball. Provide
    11·1 answer
  • What is hydroelectric power ?<br><br> Answer quickly..!
    10·2 answers
  • Why was Roemer's measurement of the speed of light inaccurate?
    12·1 answer
  • Meteorologists are interested in the relationship between minimum pressure and maximum wind speed
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!