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
lisabon 2012 [21]
3 years ago
12

When friction slows a sliding block___

Physics
1 answer:
Svetradugi [14.3K]3 years ago
6 0

Answer:

A

Explanation:

When friction slows a sliding block, <u>the kinetic energy of the block is transformed into internal energy .</u>

<em>The frictional movement of two surfaces over one another leads to the conversion of some of their kinetic energies to another energy - heat or thermal energy. Hence, the temperatures of the objects are raised in the process. </em>

<u>Therefore, when a sliding block is slowed down due to friction, some of the kinetic energy of the block would be transformed into internal energy in the form of heat.</u>

The correct option is A.

You might be interested in
En una librería un libro de 0.6 kg colocado inicialmente en un estante a 40 cm del suelo fue movido a otro estante con una altur
jeyben [28]

Considerando la definición de energía potencial:

  • la energía potencial del libro inicialmente es 2,3544 J y luego de ser movido a otro estante es 7,6518 J.
  • el cambio en la energía potencial del libro es 5,2974 J.
<h3 /><h3>Definición de energía potencial</h3>

La energía potencial es la energía que mide la capacidad que tiene un sistema para realizar un trabajo en función de su posición. En otras palabras, esta es la energía que tiene un cuerpo situado a una determinada altura sobre el suelo.

La energía potencial gravitatoria es la energía asociada con la fuerza gravitatoria. Esta dependerá de la altura relativa de un objeto a algún punto de referencia, la masa, y la fuerza de la gravedad.

Entonces para un objeto con masa m, en la altura h, la expresión aplicada a la energía gravitacional del objeto es:

Ep= m×g×h

Donde

  • Ep es la energía potencial en julios (J).
  • m es la masa en kilogramos (kg).
  • h es la altura en metros (m).
  • g es la aceleración de caída en m/s² (aproximadamente 9,81 m/s²).

<h3>Energía potencial en cada lugar</h3>

En primer lugar, se sabe inicialmente del libro:

  • m= 0,6 kg
  • g= 9,81 m/s²
  • h= 40 cm= 0,4 m (siendo 1 cm= 0,01 m)

Entonces, reemplazando en la definición de energía potencial:

Ep1= 0,6 kg× 9,81 m/s²× 0,4 m

Resolviendo:

<u><em>Ep1= 2,3544 J</em></u>

Por otro lado, se sabe los siguientes datos del libro luego de ser movido:

  • m= 0,6 kg
  • g= 9,81 m/s²
  • h= 1,30 m

Entonces, reemplazando en la definición de energía potencial:

Ep2= 0,6 kg× 9,81 m/s²× 1,30 m

Resolviendo:

<u><em>Ep2= 7,6518 J</em></u>

En resumen, la energía potencial del libro inicialmente es 2,3544 J y luego de ser movido a otro estante es 7,6518 J.

<h3>Cambio de energía potencial</h3>

El cambio en la energía potencial del libro será la diferencia entre la energía potencial luego de ser movido y la energía potencial inicial del libro:

ΔEp= Ep2 - Ep1

ΔEp= 7,6518 J - 2,3544 J

<u><em>ΔEp= 5,2974 J</em></u>

Finalmente, el cambio en la energía potencial del libro es 5,2974 J.

Aprende más sobre energía potencial:

brainly.com/question/21370800

brainly.com/question/25163940

brainly.com/question/25960490

3 0
2 years ago
Four copper wires of equal length are connected in series. Thecross sectional areas are 1 cm2, 2 cm2, 3cm2, and 5 cm2. A voltage
vampirchik [111]

Answer:

Voltage across 2 cm² wire = 29.5 V

Explanation:

We equation for resistance,

              R=\frac{\rho L}{A}

Where ρ is resistivity, L is length and A is area.

Here for the four wires ρ and L is same, only area is different.

So we have

          R_1:R_2:R_3:R_4=\frac{\rho L}{A_1}:\frac{\rho L}{A_2}:\frac{\rho L}{A_3}:\frac{\rho L}{A_3}\\\\R_1:R_2:R_3:R_4=\frac{1}{1}:\frac{1}{2}:\frac{1}{3}:\frac{1}{5}

Here total voltage is given as 120 V,

In series connection voltage divides in the ratio of resistances

That is

              V_1:V_2:V_3:V_4=\frac{1}{1}:\frac{1}{2}:\frac{1}{3}:\frac{1}{5}

              \frac{1}{1}\times x+\frac{1}{2}\times x+\frac{1}{3}\times x+\frac{1}{5}\times x=120Vx=59.02V

Voltage across 2 cm² wire =\frac{59.02}{2}=29.5V

Voltage across 2 cm² wire = 29.5 V

3 0
3 years ago
The thickest and strongest chamber in the human heart is the left ventricle, responsible during systole for pumping oxygenated b
Bess [88]

Answer:

(a). The blood travel during this acceleration is 0.0231 m.

(b). The time for the blood to reach its peak speed is 0.0459 sec.

Explanation:

Given that,

Acceleration = 22.0 m/s²

Speed = 1.01 m/s

(a). We need to calculate the distance

Using equation of motion

v^2=u^2+2as

Where, v = final speed

u = initial speed

a = acceleration

s = distance

Put the value into the formula

(1.01)^2=0+2\times22.0\times s

s=\dfrac{(1.01)^2}{2\times22.0}

s=0.0231\ m

(b). We need to calculate the time

Using equation of motion

v =u+at

Put the value into the formula

1.01=0+22t

t=\dfrac{1.01}{22}

t=0.0459\ sec

Hence, (a). The blood travel during this acceleration is 0.0231 m.

(b). The time for the blood to reach its peak speed is 0.0459 sec.

4 0
3 years ago
How does wheel and axel work​
Andrew [12]

Once the object is moving, the force of friction opposes the force exerted on the object. The wheel and axle makes this easier by reducing the friction involved in moving an object.

Hope it helps!

4 0
3 years ago
Read 2 more answers
A disk rotates freely on a vertical axis with an angular velocity of 50 rpm . An identical disk rotates above it in the same dir
True [87]

Answer:

Final angular velocity is 35rpm

Explanation:

Angular velocity is given by the equation:

I1w1i + I2w2i = I1w1f -I2w2f

But the two disks are identical, so Ii =I2

wf can be calculated using

wf = w1i - w2i/2

Given: w1i =50rpm w2i= 30rpm

wf= (50 + 20) / 2

wf= 70/2 = 35rpm

5 0
3 years ago
Other questions:
  • a moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground. if each br
    15·2 answers
  • At the outer edge of a rotating space habitat, 130 m from the center, the rotational acceleration is g. What is the rotational a
    10·1 answer
  • Explain why sodium (Na) will form an ionic bond with chlorine (Cl) but not with potassium (K).
    13·1 answer
  • how much water is needed to produce 1kwh of electricity at a power plant that is 30% efficient if the temperature increase 10 C
    13·1 answer
  • Who is good in physics??
    9·2 answers
  • Which circuit is a series circuit ?? plz help
    7·2 answers
  • Many older people become farsighted as ?
    9·1 answer
  • What causes moon phases, rotation or revolution
    7·1 answer
  • Unlike an observational study, an experiment can prove:
    9·2 answers
  • What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34 j •
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!