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
tatiyna
2 years ago
12

A 205 kg log is pulled up a ramp by means of a rope that

Physics
1 answer:
Volgvan2 years ago
7 0

Answer:2.737 kN

Explanation:

Given

mass of log(m)=205 kg

ramp inclination=30^{\circ}

coefficient of kinetic friction between log and ramp is (\mu _k)=0.9

log has an acceleration of 0.8 m/s^2

Let T be the tension in the rope

T-mgsin\theta -f_r=ma

Where mgsin\theta=Sin component of weight

f_r=friction\ Force=\mu _KN(Where N is Normal reaction)

T-mgsin\theta -\mu _k\left ( mgcos\theta \right )=ma

T=m\left ( gsin\theta +\mu _kcos\theta +a\right )

sin30=0.5

cos30=0.866

T=205\times \left ( 9.81\times 0.5+0.9\times 9.81\times 0.866+0.8\right )

T=205\times 13.35=2.737 kN

You might be interested in
Which of the following types of light has the most energy to give to an electron?
IgorC [24]
I think it’s ultraviolet, if not i’m sorry!
4 0
2 years ago
Read 2 more answers
During an isothermal process, 10 j of heat is removed from an ideal gas. What is the work done by the gas in the process?
Black_prince [1.1K]

The work done in the isothermal process is 10 joule.

We need to know about the isotherm process to solve this problem. The isotherm process can be described as a process where the initial temperature system will be the same as the final temperature. Hence, the internal energy change will be zero.

ΔU = 0

Hence,

ΔU = Q - W

0 = Q - W

Q = W

It means that the heat transferred is the same as the work done.

From the question above, we know that the heat transferred is 10 joule. Thus, the work done in the isothermal process is 10 joule.

Find more on isothermal at: brainly.com/question/17097259

#SPJ4

8 0
1 year ago
Why does a vibrating simple pendulum not to produce any sound
Gelneren [198K]
It does produce 'sound' ... a compression wave traveling through the air. But your ears don't hear a sound that's vibrating less than 20 or 30 times every second. If you could swing your pendulum that fast, you could hear the sound of its vibrations pushing the air around.
7 0
3 years ago
PLEASEEEEEE HELP
emmainna [20.7K]

Answer:

8.89 m/s² west

Explanation:

Assume east is +x.  Given:

v₀ = 120 m/s

v = 0 m/s

t = 13.5 s

Find: a

v = at + v₀

0 m/s = a (13.5 s) + 120 m/s

a = -8.89 m/s²

a = 8.89 m/s² west

8 0
2 years ago
In a darkened room, a burning candle is placed 1.84 m from white wall. A lens is placed between candle and wall at a location th
KATRIN_1 [288]

Answer:

82.4 cm

Explanation:

The object and screen are kept fixed ie the distance between them is fixed and by displacing lens between them images are formed on the screen . In the first case let u be the object distance and v be the image distance

then ,

u + v = 184 cm

In the second case of image formation , v becomes u and u becomes v only then image formation in the second case is possible.

The difference between two object distance ie(  v - u ) is the distance by which lens is moved so

v - u = 82.4 cm

7 0
3 years ago
Other questions:
  • Please help me on this question, it would mean a lot! Thank you! Only question one, thank you
    12·1 answer
  • Which of the following phases of the Moon produces the highest and lowest tides on Earth?
    7·2 answers
  • Tornadoes are most frequent from _____. April to June October to December January to March July to August
    14·1 answer
  • Determine the mass of the object below to the correct degree of precision.
    14·1 answer
  • An object is shot 8 m/s horizontally from a 7 m tall cliff. How far away does it land?
    13·1 answer
  • A sealed balloon is filled with 1.00 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the
    7·1 answer
  • On a certain map, every 3 cm represents 6 km on earth surface. Which ratio represents the scale of the map, which shows how the
    12·1 answer
  • Mr smith is designing a race where velocity will be measured.which course would allow velocity to accurately get a winner?
    13·1 answer
  • Which of the following shows the correct order of structures? A. cells organs tissues systems B. cells systems tissues organs C.
    11·2 answers
  • Gerard is measuring the speed of a remote-controlled airplane. He measures that the airplane travels 110 m in 5.4 seconds, givin
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!