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
NARA [144]
3 years ago
14

Some homes have stairs that are too steep or narrow for moving large pieces of furniture. In such cases, furniture may be lift e

d by pulleys and moved in through upper windows. What is the efficiency of a system that uses 280 N of force to lift a 100 kg bed 6 m to an upper window? Those working the system have to pull 24 m of rope to lift the bed.
Biology
1 answer:
torisob [31]3 years ago
7 0

Answer:

The efficiency of the system is 89.3%

Explanation:

Efficiency of a machine is defined as the ratio of useful work done by a machine to the total work put into the machine.

Mathematically, efficiency = (work output/work input) * 100%

work output = load * load distance

where load = 100 kg * 10 m/s² = 1000 N; load distance = 6m

work output = 1000 * 6 = 6000 J

work input = effort * effort distance

where effort = 280 N, effort distance = 24 m

work input = 280 * 24 = 6720 J

Efficiency = (6000/6720) * 100%

Efficiency = 89.3%

Therefore, the efficiency of the system is 89.3%

You might be interested in
This is a ___________ gibbous moon.
professor190 [17]
Since the question seemed to be incomplete, here's a brief apprehension about phases of the moon which might be of help.

There are several lunar phases namely: <span>New Moon, Full Moon, Waning and Waxing Crescent, Waning and waxing Gibbous, First Quarter, and the Last Quarter.

> Waning--means getting less illuminated each night; waxing means becoming more illuminated each night.
> Waning Gibbous-- less than fully illuminated
> Waxing Gibbous --more illuminated than half</span>
4 0
3 years ago
Read 2 more answers
Why are rats such successful island invaders
-BARSIC- [3]
well because tjey are small and could be transported in ships and in other transportation.
8 0
3 years ago
Why we use two op_amp when 1+A2&lt;A1​
Triss [41]
I have no idea
You play RL?
8 0
3 years ago
What are the likely steps of theories and laws?
sleet_krkn [62]
Is a proposition that has not been empirically proven yet, and that attempts to describe or justify a system or phenomenon.
5 0
3 years ago
Part E
Colt1911 [192]

Answer:

The subject definition has always been listed in the overview section elsewhere here.

Explanation:

Something you are attempting to calculate is a variable. It can be something, such as things, quantities of time, emotions, actions, or thoughts. If you're researching how people here feel regarding specific tv programs, television shows as well as emotions are the factors throughout the analysis. If you are learning how various forms of fertilizer influence how tall plants develop, fertilizer form and plant height seem to be the variables.

<u>Independent Variable</u>

  • The independent variable seems to be the variable whom the adjustment is not influenced throughout the analysis by every other variable. Usually, the researcher herself needs to modify the independent variable or it adjusts by itself because nothing influences or adjusts this one in the project.

<u>Dependent Variable</u>

  • Throughout the analysis, the dependent variable that's what's being examined but instead evaluated. As something of a consequence of the modifications to something like the independent variable, that's what modifications.
5 0
3 years ago
Other questions:
  • During a dramatic environmental change, which event is most probable
    15·1 answer
  • What is that balanced?
    12·1 answer
  • The __________ of the organic molecule controls the chemistry of life
    13·2 answers
  • Describe inflammation. (module 20.13a) inflammation is a vascular response to injury to cause vasoconstriction and reduce blood
    7·1 answer
  • The cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two d
    8·1 answer
  • Ocean water is sometimes referred to as saline water as it contains significant concentrations of dissolved salts. Please select
    12·2 answers
  • "A man has a mutation in a mitochondrial gene encoding a subunit of the ATP synthase complex. The mutation leads to a defective
    11·1 answer
  • Before testing the pea plants, Mendel formed a five-part hypothesis. What did Mendel include in his hypothesis? Check all that a
    11·2 answers
  • Which TWO events happen in the rock cycle
    5·2 answers
  • 31. Explain why scientists believe the Earth developed in a series of layers.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!