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
ankoles [38]
4 years ago
11

How much work is done by a crane that lowers 1000N of material a distance of 150

Physics
2 answers:
ludmilkaskok [199]4 years ago
3 0
The crane does NO work.

Work = (force) x (distance)

         = (1,000 N) x (150 meters ?)  =  150,000 joules

But the work is in the direction of the force, and it isn't the crane
pushing the material down.  It's gravity.

Gravity is doing the work. 

If the material was being lowered by a cable wrapped around the shaft
of an electric generator, then you could use the work done by gravity to
generate some electrical energy, and then sell the energy.

Or, if the "material" happened to be water, you could let gravity lower it
through a turbine or a water wheel, and use the work done by gravity to
grind wheat.

Yes, the crane may be raising a sweat, working against gravity.  The
purpose is only to prevent gravity from doing the work too fast.
Citrus2011 [14]4 years ago
3 0
Since workdone is Force times distance Given force-1000n Distance-150 Wd-1000 times 150 Wd-150000n.
You might be interested in
What is the heaviest planet in the worlx​
Sever21 [200]
The heaviest planet in the world is Jupiter!
7 0
3 years ago
Read 2 more answers
Is Natural Gas nonrenewable or renewable? Why? Use in your own words.
Nutka1998 [239]

Answer:

Natural gas is non renewable energy.

Explanation:

Because they were formed from the buried reamains of plants and animals that live a million years ago. It is formed from fossil fuels.

6 0
3 years ago
Five hundred joules of heat are added to a closed system. The initial internal energy of the system is 87 J, and the final inter
mina [271]
The answer is D. i got all the other ones wrong ._.

8 0
3 years ago
Read 2 more answers
If your runnin at full speed for an average human, and lept over a 10 foot brook would you make it?
Vika [28.1K]
Unless you are a mutant....I don't think you would make it. I'm 5'8" and most people are 6'7" or less. It's bsically impossible to do. :)
7 0
3 years ago
Read 2 more answers
If a crow flies west for 60 km and then south for 45 km, what is the direction of its displacement?
son4ous [18]
That's 105 km that he flew, or 65.2 miles !  I'm absolutely positive
that the crow must have landed and gotten some rest when you
weren't looking.  But that had no effect on his displacement when
he got where he was going, so we can continue to solve the problem:


The displacement is the distance and direction from the place
where the crow took off to the place where he landed.

-- It's distance is the hypotenuse of the right triangle whose legs
are 60 km and 45 km.

        D²  =  (60 km)²  +  (45 km)²

              =    3,600 km²  +  2,025 km²  =  5,625 km²

         D  =  √(5625 km²)  =  75 km .    
 
-- It's direction is the angle whose tangent is  (45 S / 60 W).

         tan⁻¹ (45/60)  =  tan⁻¹ (0.75)  =  36.9° south of west

                                                         =  53.1° west of south.

                                                         =  not exactly southwest but close.
7 0
3 years ago
Other questions:
  • How does an atom of bromine-79 become a bromide ion with a -1 charge?
    13·1 answer
  • Which cell process occurs only in organisms that
    7·1 answer
  • A ball was thrown from a projectile building of 30m which moves at a constant velocity of 20m/s and has an angle of 30degrees to
    10·2 answers
  • How did early photosynthetic organisms change Earth’s atmosphere?
    8·1 answer
  • The longer the lever, the greater the
    14·1 answer
  • The flow of energy through living systems can be modeled as food chains. True or False
    13·1 answer
  • A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and
    11·1 answer
  • Which are the basic physical sciences?
    14·2 answers
  • IF SOME ONE SENDS U A LINK DO NOT PUSH ON IT CUZ THEY WILL HACK UR STUFF .................. BE CAREFUL PLZ
    9·1 answer
  • As crust forms at the mid-ocean ridge, it gets pushed away from the ridge as newer crust forms. What is true about crust that fo
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!