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
maxonik [38]
4 years ago
13

A person does 50j of work to lift a crate using a pulley. The plley's work output is 42j. What is the pulleys mechanical efficie

ncy?
Physics
1 answer:
ruslelena [56]4 years ago
8 0
(42/50)*100=84%

Because efficiency =(Useful/total)*100

Hope this helps!
You might be interested in
What are the main characteristics of S.H.M​
agasfer [191]

Answer:

•→ The motion of a particle or body in S.H.M acts towards a fixed point.

•→ Acceleration of the body under S.H.M is proportional to its displacement.

•→ This motion is periodic.

•→ Mechanical energy is conserved in S.H.M

Explanation:

S.H.M is Simple Harmonic Motion

.

4 0
3 years ago
Read 2 more answers
DESPERATE WILL GIVE BRAINLIST AND THANKS
Ierofanga [76]

Explanation:

Human body, the physical substance of the human organism, composed of living cells and extracellular materials and organized into tissues, organs, and systems.

https://www.britannica.com › science

human body | Organs, Systems, Structure, Diagram, & Facts |

6 0
3 years ago
Ocean currents near the equator are primarily: eastward westward north and south clockwise
sladkih [1.3K]
Equatorial currents are primarily westward. This is because the dominant current in the northern hemisphere has a clockwise direction, while the southern hemisphere has a counterclockwise direction. When these two currents meet at the equator, a common westward current exists.
3 0
4 years ago
Suppose you increase your walking speed from 7 m/s to 15 m/s in a period of 2 m. What is your acceleration?
likoan [24]

Acceleration = (change in speed) / (time for the change)

Change in speed = (end speed) - (start speed) = (15 m/s - 7 m/s) = 8 m/s

time for the change = 2 minutes = 120 seconds

Acceleration = (8 m/s) / (120 seconds)

Acceleration = 0.067 m/s²

7 0
3 years ago
What affect does a doubling of the net force have upon the acceleration of the object?
balandron [24]
F = ma
a = f/m
if f doubled , acc. will be doubled
5 0
3 years ago
Read 2 more answers
Other questions:
  • A group of physics students hypothesize that for an experiment they are performing, the speed of an object sliding down an incli
    13·2 answers
  • Two long wires are oriented so that they are perpendicular to each other, and at their closest they are 20.0 cm apart. What is t
    14·1 answer
  • What effect does an increase in temperature have on viscosity?
    5·2 answers
  • What is the electric field at the center of the metal ball due only to the charges on the surface of the metal ball? (Express yo
    14·1 answer
  • (a) What is the best coefficient of performance for a refrigerator that cools an environment at −30.0ºC and has heat transfer to
    14·1 answer
  • Sian wants to measure the number of seconds that it takes for the contents of a beaker to change from clear to purple. Which of
    10·2 answers
  • Compare and contrast the way molecules behave in liquid to the way they behave in solids and gases.
    13·2 answers
  • Which options lists a form of kinetic energy followed by a form of potential
    14·1 answer
  • how much heat is produced in one hour by an electric iron which draws 2.5ampere when connected to a 100V supply​
    12·1 answer
  • When current first leaves the battery, how much voltage does it have
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!