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
photoshop1234 [79]
3 years ago
13

17. A 25 kg block is initially at rest on a rough, horizontal surface. A horizontal force of 75 N is required to set

Physics
1 answer:
lapo4ka [179]3 years ago
4 0

Answer:

0.30581

0.24464

Explanation:

\mu_s = Coefficient of static friction

\mu_k = Coefficient of kinetic friction

F_f = 75 N

F_k = 60 N

Normal force

F_n=mg\\\Rightarrow F_n=25\times 9.81\\\Rightarrow F_n=245.25\ N

Frictional force

F_f=\mu_sF_n\\\Rightarrow \mu_s=\frac{F_f}{F_n}\\\Rightarrow \mu_s=\frac{75}{245.25}\\\Rightarrow \mu_s=0.30581

The coefficient of static friction is 0.30581

Kinetic force

F_k=\mu_kF_n\\\Rightarrow \mu_k=\frac{F_k}{F_n}\\\Rightarrow \mu_s=\frac{60}{245.25}\\\Rightarrow \mu_s=0.24464

The coefficient of kinetic friction is 0.24464

You might be interested in
Ples help qustion in the image
ella [17]

I would say that an astronaut will fell the lightest in the moon because all of the low gravity.

Very appreciated if this answer helped you out .

6 0
4 years ago
Which of these is the correct size order starting with the smallest first
podryga [215]

Answer:

Universe, Galaxy, Sun.

Explanation:

The universe is everything. It contains billions of galaxies.

A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.

Then the sun smallest.

3 0
3 years ago
Read 2 more answers
City A and City B are located far apart at the same latitude. City A has a much greater annual temperature range than City B. Th
Oksana_A [137]

Answer:

a). is lower in elevation than city B                                

Explanation:

Temperature of a place greatly varies with height or altitudes.

As we go higher the atmospheric pressure becomes less and the temperature decreases. We feel cold at higher altitude places and relatively hot at places of lower elevation. Therefore City A which is at lower elevation  has  greater annual temperature range than the temperature range of city B although they are located at the same latitude. City A is at lower altitude and City B's elevation is higher. So City A has higher temperature range than city b.

7 0
4 years ago
The specific heat of a substance is the energy required to produce a certain change in _____________. A. appearance B. volume C.
CaHeK987 [17]
I think C I’m not 100% sure.
6 0
3 years ago
Read 2 more answers
A toy helium balloon is initially at a temperature of T = 24o C. Its initial volume is 0.0042 m3 (It is a 10 cm radius sphere).
Anettt [7]

Answer:

T_{f} = 335.780\,K\,(62.630\,^{\textdegree}C)

Explanation:

Let assume that air behaves ideally. The equation of state of ideal gases is:

P\cdot V = n\cdot R_{u}\cdot T

Where:

P - Pressure, in kPa.

V - Volume, in m³.

n - Quantity of moles, in kmol.

R_{u} - Ideal gas constant, in \frac{kPa\cdot m^{3}}{kmol\cdot K}.

T - Temperature, in K.

Since there is no changes in pressure or the quantity of moles, the following relationship between initial and final volumes and temperatures is built:

\frac{V_{o}}{T_{o}} = \frac{V_{f}}{T_{f}}

The final temperature is:

T_{f} = \frac{V_{f}}{V_{o}}\cdot T_{o}

T_{f} = 1.13\cdot (297.15\,K)

T_{f} = 335.780\,K\,(62.630\,^{\textdegree}C)

7 0
4 years ago
Read 2 more answers
Other questions:
  • Jim Abbott was drafted ________ overall in the first round of the 1989 draft.
    6·2 answers
  • Someone please help me
    13·1 answer
  • Lab: Thermal Energy Transfer What is the purpose of the lab, the importance of the topic, and the question you are trying to ans
    7·1 answer
  • Two disks are mounted (like a merry-go-round) on low friction bearings on the same axle and can be brought together so that they
    9·1 answer
  • Super Invar, an alloy of iron and nickel, is a strong material with a very low coefficient of thermal expansion (0.20× 10−6 C∘).
    12·1 answer
  • 12.A 48.0 kg woman, riding on a 12 kg cart, is moving east at 8.0 m/s. The
    7·1 answer
  • Look at this picture of a whale shark. Which question about the whale shark is nonscientific?
    7·2 answers
  • A block of copper with mass 0.500 kg is heated to 400. degrees Celsius from 290. degrees Celsius. The specific heat capacity of
    8·1 answer
  • How many calories would you take in if you ate the whole box of crackers in one sitting ?
    14·1 answer
  • Cómo crees que la actividad física mejora tu salud mental​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!