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
iragen [17]
3 years ago
5

What is the average power output of an athlete who can life 9.0 * 10^2 kg 2.5 m in 2.0 s?

Physics
1 answer:
vampirchik [111]3 years ago
5 0

Answer:

11025 W

Explanation:

Given that athlete can lift a mass of 900 kg by 2·5 m in 2 s

<h3>Average power output is defined as the work done per unit time</h3><h3>∴ Average power output = (work done) ÷ (time taken)</h3>

Here on the object the force that acts is the weight of that object

∴ Force on that object = (mass of the object) × (acceleration due to gravity) = 900 × 9·8 = 8820 N

∴ Person requires this much force to lift that object

<h3>Work done on the object is defined as the dot product of force and displacement</h3>

∴ Work done = 8820 × 2·5 =22050 J

Power = 22050 ÷ 2 = 11025 W

∴ Average power output of the athlete = 11025 W

You might be interested in
14. Three identical light bulbs are connected in series, then are disconnected and arranged in parallel. For each of the scenari
Inessa [10]
In order to make things easier to describe and explain, let's call
the resistance of each bulb 'R', and the battery voltage 'V'.

a).  In series, the total resistance is 3R.
In parallel, the total resistance is R/3.
Changing from series to parallel, the total resistance of the circuit
decreases to 1/9 of its original value.

b).  In series, the total current is  V / (3R) .
In parallel, the total current is  3V / R .
Changing from series to parallel, the total current in the circuit
increases to 9 times its original value.

c).  In series, the power dissipated by the circuit is 

                                   (V) · V/3R  =  V² / 3R .

In parallel, the power dissipated by the circuit is

                                   (V) · 3V/R  =  3V² / R .

Changing from series to parallel, the power dissipated by
the circuit (also the power delivered by the battery) increases
to 9 times its original value.

8 0
3 years ago
Earth is the only planet able to support what
saw5 [17]
Life... obviously lol           
8 0
3 years ago
Read 2 more answers
List the parts of the electromagnetic spectrum from longest wavelength to shortest wavelength
Lilit [14]
The rays of the electromagnetic spectrum from shortest to longest wavelength are: radio waves, microwaves, infrared rays, optical rays, ultraviolet rays, X-rays, and gamma-rays.

EDIT: He has these backwards, the shortest wavelength is created by Gamma-Rays and the longest is Radiowaves.

<span> Remember- high energy = short wavelength. </span>
6 0
3 years ago
What is your acceleration while sitting in your chair. the latitude of corvallis is 44.4˚.?
marta [7]
 <span>You can start with the equations you know 

a=v^2/r = (2pi*r/T)^2/r = 4pi^2r/T^2 

Radius of earth (R) = 6378.1 km 
Time in one day (T) = 86400 seconds 
Latitude = 44.4 degrees 

If you draw a circle and have the radius going out at a 44.4 degree angle above the center you can then find the r. 

r=Rcos(44.4) 
r=6378.1cos(44.4) 
r= 4556.978198 km or 4556978 m 

Now you can plug this value into the acceleration equation from above... 

a= 1.8*10^8/7.47*10^9 
a= .0241 m/s^2 </span>
8 0
2 years ago
The diagram shows four paths from point A to point B.
iVinArrow [24]
Path 2.

Displacement is the direction and magnitude of an object from its starting point, so path 2 is the direct route you would need to take to find direction and magnitude.
8 0
2 years ago
Other questions:
  • Which sentence uses a verb incorrectly?
    11·1 answer
  • Which of the following has the greatest density?
    5·1 answer
  • Summarize the steps you might use to carry out an investigation using scientific methods
    6·1 answer
  • A closely wound, circular coil with radius 2.50 cmcm has 740 turns. Part A What must the current in the coil be if the magnetic
    12·1 answer
  • The statement that "the lowest energy configuration for an atom is the one having the maximum number of unpaired electrons allow
    5·2 answers
  • Degree day calculations are based on a temperature of?
    15·1 answer
  • 2. Stars normally convert hydrogen into helium through nuclear fusion. That requires incredibly hot temperatures and high pressu
    5·1 answer
  • All electric charge is based on the protons and electrons in atoms. true or false
    12·1 answer
  • what did taking measurements reveal about the velocity of the fireball? Was the fireball’s velocity constant or changing?
    13·1 answer
  • Suppose your class invites a person to give a speech. When you test out the sound system in the gym you find there are so many e
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!