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
Hitman42 [59]
3 years ago
10

PLEASE HELP Which of the following describes the efficiency of real machines? 1.Efficiency is 100% 2.IMA is always larger than t

he AMA 3.IMA is always smaller than the AMA 4.IMA is equal to the AMA
Physics
1 answer:
Rom4ik [11]3 years ago
5 0

Answer:

IMA is always larger than the AMA

Explanation:

IMA is Ideal Mechanical Advantage and it equals the length of effort that is divided by the length of resistance which is given by the formula

IMA= Fr/Fe

Where Fr is the resistance force

Fe is the effort force.

IM= de/dr

Where de is the distance of the applied effort  

dr is the distance traveled by the load.

In any real machine, the effort is needed to overcome friction and because of this, the ideal mechanical advantage(IMA) is always larger than the actual mechanical advantage (AMA)

You might be interested in
15. How much work must be done to stop a 1700-kg car traveling at 90 km/hr<br> Pag
Nikolay [14]

Answer:531250J

Explanation:

8 0
4 years ago
Sir wants to see if a new shower cleaner works better in removing soap dirt than his old cleaner.  He uses the new cleaner on on
sergeinik [125]
The independent variable in this problem would be the different types of shower cleaner. The dependent variable would be the shower tiles.
8 0
3 years ago
An apple in a tree has a gravitational store of 8J. As it falls, it accelerates constantly until it hits the ground. What is the
natita [175]

Answer:

Explanation:

Given that on the tree the gravitational energy stored is 8J

Then, mgh = 8J.

The apple begins to fall and hit the ground, what is the maximum kinetic energy?

Using conservation of energy, as the above is about to hit the ground, the apple is at is maximum speed, and the height then is 0m, so the potential energy at the ground is zero, so all the potential of the apple at the too of the tree is converted to kinetic energy as it is about to hits the ground. Along the way to the ground, both the Kinetic energy and potential energy is conserved, it is notice that at the top of the tree, the apple has only potential energy since velocity is zero at top, and at the bottom of the tree the apple has only kinetic energy since potential energy is zero(height=0)

So,

K.E(max) = 8J

5 0
3 years ago
A car traveling at 27.4 m/s hits a bridge abutment. A passenger in the car, who has a mass of 65.0 kg, moves forward a distance
Minchanka [31]

Answer:

F=43570.9N

Explanation:

We can calculate the acceleration experimented by the passenger using the formula v_f^2=v_i^2+2ad, taking the initial direction of movement as the positive direction and considering it comes to a rest:

a=\frac{v_f^2-v_i^2}{2d}=\frac{-v_i^2}{2d}

Then we use Newton's 2nd Law to calculate the force the passenger of mass m experimented to have this acceleration:

F=ma=\frac{-mv_i^2}{2d}

Which for our values is:

F=\frac{-(65kg)(27.4m/s)^2}{2(0.56m)}=43570.9N

6 0
4 years ago
A satellite has a mass of 5850 kg and is in a circular orbit 4.1 x10 to the 5th power m above the surface of a planet. The perio
koban [17]

Answer:

 W = 24.28 kN

Explanation:

given,

Mass of satellite = 5850 Kg

height , h = 4.1 x 10⁵ m

Radius of planet = 4.15 x 10⁶ m

Time period = 2 h

                    = 2 x 3600 = 7200 s

Time period of satellite

T = \dfrac{2\pi}{R}\sqrt{\dfrac{(R+h)^3}{g}}

R is the radius of planet

h is the height of satellite

T^2 = \dfrac{4\pi^2}{R^2}\ {\dfrac{(R+h)^3}{g}}

now calculation of acceleration due to gravity

g = \dfrac{4\pi^2}{R^2}\ {\dfrac{(R+h)^3}{T^2}}

g = \dfrac{4\pi^2}{(4.15\times 10^6)^2}\ {\dfrac{(4.15\times 10^6+4.1\times 10^5)^3}{(7200)^2}}

g = 4.15 m/s²

True weight of satellite

W = m g

W = 5850 x 4.15

W = 24277.5 N

 W = 24.28 kN

True weight of the satellite is   W = 24.28 kN

8 0
3 years ago
Other questions:
  • a boat travels 40 miles in two hours, speeds up to travel the next 80 miles in three hours then slows down to travel the last 40
    15·2 answers
  • What is evaporation​
    8·2 answers
  • The total amount of energy and mass in the universe is _____.
    15·2 answers
  • Air moves in and out of the lungs through a set of tubes that make up the airways.
    7·2 answers
  • When operated on a household 110.0 V line, typical hair dryers draw about 1650 W of power. The current can be modeled as a long,
    6·1 answer
  • A particle with mass 1.81×10−3 kgkg and a charge of 1.22×10−8 CC has, at a given instant, a velocity v⃗ =(3.00×104m/s)j^v→=(3.00
    13·1 answer
  • A person is walking on a treadmill. The treadmill is moving backwards at a speed of 3.0 m/s. The person is moving forward relati
    9·1 answer
  • A gun has a muzzle speed of 80 meters per second. What angle of elevation should be used to hit an object 180 meters away? Negle
    11·2 answers
  • Answer the question correctly &amp; look at the picture.
    5·2 answers
  • The potential energy for a mass on a spring is proportional to the square of which of these quantities?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!