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
VladimirAG [237]
3 years ago
6

A girl whose mass is 40kg walk up a flight of 20steps each 15mm hight in 10seconds.find power developed by the girl showing the

solution
​
Physics
1 answer:
Pepsi [2]3 years ago
7 0

Answer: Approximately 11.76 joules per second

=========================================================

Work Shown:

Mass = 40 kg

Force pulling down = (mass)*(gravity) = 40*9.8 = 392 newtons

Roughly 392 newtons of force are pulling down on her.  

To climb the steps, she must apply 392 newtons of force upward.  

---------------

Displacement = 20*(15 mm) = 300 mm = 0.3 m

Work = Force*Displacement

Work = 392*0.3

Work = 117.6 joules of energy

---------------

Power = (Work)/(Time)

Power = (117.6 joules)/(10 seconds)

Power = (117.6/10) joules per second

Power = 11.76 joules per second, which is approximate

You might be interested in
List how many significant figures the numbers contain. A. 205 cm. B. .00004 cm. C. 20 cm. D. 20. Cm.
stiv31 [10]
A. 205 cm
   This has 3 significant figures: 2,0 and 5.

B. 0.00004 cm
   This has 1 significant figure: 4

C. 20 cm
   This has 2 significant figures: 2 and 0.

D. 20. cm
    This has 2 significant figures: 2 and 0 
7 0
3 years ago
It shows gas particles leaving the car exhaust what procees
Lubov Fominskaja [6]

The gas particles leaving the car exhaust show the process of combustion.

<h3>What is the process of combustion?</h3>

Combustion refers to a chemical process in which a substance reacts with oxygen to give off heat. The original substance is known as the fuel, whereas the source of oxygen is known as the oxidizer. The fuel can be present in solid, liquid, or gas, but for an airplane, the fuel is usually a liquid form. Combustion also called burning that is the basic chemical process of releasing energy from a fuel and air mixture. In an internal combustion engine, the ignition and combustion of the fuel occurs within the engine. The engine converts the energy from the combustion process to work.

So we can conclude that the car releases gases due to the process of combustion.

Learn more about exhaust here: brainly.com/question/17325487

#SPJ1

4 0
1 year ago
Motion is a change in direction. True or False?
Otrada [13]
False... motion is a change in position. Not direction
3 0
3 years ago
Read 2 more answers
17. The four points built into the camera to ensure that each exposure can be oriented
3241004551 [841]
The diameter of the circle is 18 m. Eugene incorrectly says that the circumference of the circle is about 113.04 m. What mistake did Eugene make? Use 3.14 for pi.
7 0
3 years ago
What are some charactersitics of pressure waves
True [87]
Soft target by impact and its contribution to indirect bone fractures.
7 0
3 years ago
Other questions:
  • A 75.0-kg man steps off a platform 3.10 m above the ground. he keeps his legs straight as he falls, but his knees begin to bend
    14·1 answer
  • Many fungi are decomposers. true or false ?
    5·1 answer
  • What would a physicist do to determine how tires affect the motion of a car?
    15·1 answer
  • Suppose that a ball decelerates from 8.0 m/s to a stop as it rolls up a hill, losing 10% of its kinetic energy to friction. Dete
    5·1 answer
  • The current loop lies flat on a horizontal surface. Facing the loop from the top, the current moves in a clockwise direction. Wh
    12·1 answer
  • Assuming the atmospheric pressure is 1 atm at sea level, determine the atmospheric pressure at Badwater (in Death Valley, Califo
    13·1 answer
  • Bob ran at 5 m/s for 4 seconds and ended up at position 8 m. Where did he start
    11·1 answer
  • What is the energy contained in a 0.950 m3 volume near the Earth's surface due to radiant energy from the Sun?
    6·1 answer
  • Two rubber bullets (each of the same mass) are fired at the same velocity towards two different blocks of equal mass. One block
    15·1 answer
  • A cannonball explodes in mid-air, fragmenting into several pieces. How does the total
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!