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
Eva8 [605]
3 years ago
13

A box slides to the right along a horizontal surface which is true about the friction force

Physics
1 answer:
mixer [17]3 years ago
7 0

Answer:

It is a force in the direction of the motion that allows the box to move

Explanation:

You might be interested in
Help!!!!!!!!! Attached question<br><br><br> QUICK WILL GIVE BRAINLIEST
Setler79 [48]
The answer is C.. because angles at north start from 0..
4 0
3 years ago
. An express train passes through a station. It enters with an initial velocity of 22.0 m/s and decelerates at a rate of 0.150 m
Alekssandra [29.7K]

Answer:

Explanation:

Give it that,

Initial velocity

u = 22m/s

Deceleration a = - 0.15m/s2

Time taken to travel a station long of 210m

Using equation of motion

Let know the final velocity, when it leaves the station

v² = u²+2as

v² = 22²+2×(-0.15)×210

v² = 484—63

v² = 421

v =√421

v = 20.52m/s

Then,

Using equation of motion to find time taken

v = u + at

20.52 = 22 +(-0.15)t

20.52-22 = -0.15t

-0.15t = -1.48

t = -1.48/-0.15

t = 9.88 sec

6 0
4 years ago
From the gravitational law, calculate the weight W (gravitational force with respect to the earth) of a 70 kg spacecraft traveli
Firlakuza [10]

Answer:

The  value in Newton is W =  631.92 \  N

The  value in pounds is    W  = 142 \ lb

Explanation:

From the question we are told that

  The  mass of the spacecraft is  m =  70 \  kg

   The distance above  the earth is  d =  275 \  km  =  275000 \  m

Generally the gravitational force with respect to the earth is mathematically represented as

       W =  \frac{G * m *  m_e}{ (d + r_e)^2}

Here m_e is the mass of earth with value m_e =  5.978 *10^{24} \  kg

       r_e is the radius of the earth with value  r_e  =  6371  \ km  =  6371000 \ m

   G is the gravitational constant with value G  =  6.67 *10^{-11}  \  m^3/ kg\cdot s^2

So

     W =  \frac{ 6.67 *10^{-11} *  70 *  5.978 *10^{24}}{ (275000 + 6371000)^2}

     W =  631.92 \  N

Converting to  pounds

    W =  \frac{631.92  }{4.45}

        W  = 142 \ lb

     

7 0
3 years ago
What phenomenon causes the fuzzy image? What kind of lens is used to correct this, and how is it corrected?
mamaluj [8]
In optics, chromatic aberration (abbreviated CA; also called chromatic distortion and spherochromatism) is an effect resulting from dispersion in which there is a failure of a lens to focus all colors to the same convergence point.[1] It occurs because lenses have different refractive indices for different wavelengths of light. The refractive index of transparent materials decreases with increasing wavelength in degrees unique to each.
5 0
3 years ago
Read 2 more answers
A substance maintaining a uniform appearance throughout
777dan777 [17]
Is there anything else you can add for context
5 0
3 years ago
Other questions:
  • How does gravity affect balanced/unbalanced forces?
    7·2 answers
  • Moving with a speed of v km/hour, a train travels the distance between the points A and B, which is 600 km, in t hours. Find the
    13·1 answer
  • PLEASE HELP 55 POINTS!!!
    14·2 answers
  • Two children of about the same weight are playing at the playground. They both climb up to the top of a small tower. One slides
    14·1 answer
  • A monkey hangs stationary at the end of a vertical vine. What two forces act on the monkey? Which force, if either, is greater?
    14·1 answer
  • When an electron de-excites from the third quantum level to the second, and then to the ground state, two photons are emitted. T
    13·1 answer
  • PLEASE ANSWER THESE 2 questions. ASAP!!! Will mark brainiest
    7·2 answers
  • Does energy generation through a wind generator seem to depend more on potential or kinetic energy? Explain.
    11·1 answer
  • You are designing a ski jump ramp for the next Winter Olympics. You need to calculate the vertical height h from the starting ga
    8·1 answer
  • Gerry is looking at salt under a powerful microscope and notices a crystalline structure. What can be known about the salt sampl
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!