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
madreJ [45]
3 years ago
13

Una pelota rueda por una pendiente con aceleración constante. Cuando pasa por un punto P su velocidad es 1,2 ms-1 y al cabo de u

n breve periodo de tiempo pasa por el punto Q con una velocidad de 2,6 ms-1 .
a. Determine ¿cuál es la velocidad media entre P y Q?
b. Si tarda 1,4s en ir de P a Q, calcule ¿cuál es la distancia PQ?
c. Determine ¿cuál es la aceleración de la pelota entre P y Q?
d. Explicar si la aceleración media en el tramo P y Q es la misma que la calculada en la pregunta c
Physics
1 answer:
Sunny_sXe [5.5K]3 years ago
4 0

Answer:

a) v_{m} = 1.9 m / s , b) x = 2.66 m, c) a = 1 m / s , d)the acceleration is constant the average and instantaneous acceleration is equal

Explanation:

a) The average speed is defined as the average value of the speed in a given interval

        v_{m} = (v1 + v2) / 2

        v_{m} = (1,2 + 2,6) / 2

         v_{m} = 1.9 m / s

b) the distance traveled can be obtained with the average speed

       a = v_{m}  t

       x = 1.9 1.4

       x = 2.66 m

c) to find the acceleration let's use

      v = v₀ + a t

      a = (v- v₀) / t

       a = (2.6 - 1.2) / 1.4

      a = 1 m / s

d) as in the problem they indicate that the acceleration is constant the average and instantaneous acceleration is equal in the case of acceleration variables may not be the same

You might be interested in
How much heat (in calories) are needed to raise the temperature of 60 g of water
laila [671]

Answer:

Well, each ml of water requires one calorie to go up 1 degree Celsius, so this liter of water takes 1000 calories to go up 1 degree Celsius.

Explanation:

3 0
3 years ago
Explain why urban sprawl occurs even though it negatively impacts the environment.
Grace [21]
Urban sprawl occurs when housing is filled in one location and car dependent communities are forced to moved away from the central urban areas where the population is too vast, even though this impacts the environment by increasing pollution and causing environmental degradation.
3 0
3 years ago
Read 2 more answers
Help me find the acceleration
ANEK [815]

a = 3.09 m/s²

<h3>Explanation</h3>

This question doesn't tell anything about how long it took for the car to go through 105 meters. As a result, the <em>timeless </em>suvat equation is likely what you need for this question.

In the <em>timeless</em> suvat equation,

a = \dfrac{v^2 - u^2}{2\; x}

where

  • a is the acceleration of the car;
  • v is the <em>final</em> velocity of the car;
  • u is the <em>initial</em> velocity of the car; and
  • x is the displacement of the car.

Note that <em>v</em> and <em>u</em> are velocities. Make sure that you include their signs in the calculation.

In this question,

  • a is the unknown;
  • v = -10.9 \; \text{m} \cdot \text{s}^{-2};
  • u = -27.7 \; \text{m} \cdot \text{s}^{-2}; and
  • x = - 105 \; \text{m}.

Apply the <em>timeless</em> suvat equation:

a = \dfrac{v^{2} - u^{2}}{2\; x}\\\phantom{a} = \dfrac{(-10.9)^{2} - (-27.7)^{2}}{2 \times (-105)}\\\phantom{a} = 3.09 \; \text{m} \cdot \text{s}^{-2}.

The value of a is greater than zero, which is reasonable. Velocity of the car is negative, meaning that the car is moving backward. The car now moves to the back at a slower speed. Effectively it accelerates to the front. Its acceleration shall thus be positive.

7 0
3 years ago
Indica qué es una propiedad específica de la materia. Además explica por qué son útiles las propiedades específicas de la materi
Katyanochek1 [597]

Answer:

Check Explanation

Comprobar explicación

Explanation:

English Translation

Indicate what a specific property of matter is. Also explain why the specific properties of matter are useful compared to the general ones.

Solution

The specific properties of matter are properties that describes the intensive properties of the system. They are properties that do not depend on or change with the extent or size of the system. They are usually obtained by dividing the generalised properties or extensive properties by the extent or size of matter to make them independent of size/extent/Mass.

Examples of specific properties include specific heat capacity, specific volume etc. They usually have units of general units/Mass units.

The specific properties of matter are more important than the general ones because

- They help in general comparisons of the properties of different materials. They are used to rank, classify and compare properties of different materials.

- They are used in reference table/data to easily record easily accessible properties of matter. It helps to record standards that are general and independent of sizes/extents/Mass, thereby keeping the reference table/data/chart precise and concise.

- They provide us with values that are easy to memorize and remember, unlike trying to cram the different properties of different masses/sizes of matter.

In Spanish/En español

Las propiedades específicas de la materia son propiedades que describen las propiedades intensivas del sistema. Son propiedades que no dependen ni cambian con la extensión o el tamaño del sistema. Por lo general, se obtienen dividiendo las propiedades generalizadas o las propiedades extensivas por la extensión o el tamaño de la materia para hacerlas independientes del tamaño / extensión / masa.

Los ejemplos de propiedades específicas incluyen capacidad calorífica específica, volumen específico, etc. Usualmente tienen unidades de unidades generales / unidades de masa.

Las propiedades específicas de la materia son más importantes que las generales porque

- Ayudan en las comparaciones generales de las propiedades de diferentes materiales. Se utilizan para clasificar, clasificar y comparar propiedades de diferentes materiales.

- Se utilizan en la tabla / datos de referencia para registrar fácilmente propiedades de materia fácilmente accesibles. Ayuda a registrar estándares que son generales e independientes de tamaños / extensiones / masa, manteniendo así la tabla / datos / tabla de referencia precisa y concisa.

- Nos proporcionan valores que son fáciles de memorizar y recordar, a diferencia de tratar de agrupar las diferentes propiedades de diferentes masas / tamaños de materia.

Hope this Helps!!!

¡¡¡Espero que esto ayude!!!

7 0
3 years ago
Ondas de agua en un plato poco profundo tienen 6
castortr0y [4]
I don’t speak Spanish sorry
6 0
3 years ago
Other questions:
  • A weight lifter is trying to lift a 1500-N weight but can apply a force of only 1200 N on the weight. One of his friends helps h
    10·1 answer
  • Why degree F is best to measure accurate temperature<br>​
    10·1 answer
  • Clouds in our atmosphere cause us to see the different phases of the moon.
    12·2 answers
  • The clouds in the sky appear to be white because the clouds _____?
    11·1 answer
  • 0.30 s after seeing a puff of smoke rise from the starter pistol the sound of the firing of the pistol is heard by the track tim
    10·1 answer
  • Suppose you pull two opposite sides of the loop away from each other, such that the other two sides get closer, reducing the loo
    15·1 answer
  • Light of wavelength λ travels through a medium with an index of refraction n1before striking a thin film with an index of refrac
    15·1 answer
  • Naomi is taking a train from DC to New York which is 360km apart. If the train is traveling at an average speed of 32 meters per
    14·1 answer
  • To understand the photoelectric effect physiciests should view light as having what type of properties?
    5·1 answer
  • I NEEEED HELPPPPPPP PLEASEEEE
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!