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
malfutka [58]
2 years ago
7

A girl weighing 50 kgf wears sandals of pencil heel of area of cross section 1 cm^2, stands on the floor.An elephant weighing 20

00 kgf stands on foot each area of cross section 250 cm^2,on the floor.Compare the pressure exerted by two of 'em.​
Physics
1 answer:
Klio2033 [76]2 years ago
3 0

Answer:

\boxed{{\boxed{\blue{ 12.5}}}}

Explanation:

Given, for girl : Weight or force;

\rm \: F_1 = 50 \: kgf

Area of both heels;

\rm \: A_1 =  \; 2 ×1 \;  cm^2 = 2  \: cm^2

\rm \: Pressure \:  P_1  =  \cfrac{F_1}{ A_1 }  =  \dfrac{50 \: kgf}{2 \: cm {}^{2} }  = 25 \: kgf \: cm {}^{ - 1}

For elephant, Weight = Force \rm F_2 = 2000 kg•f

Area of 4 feet;

\rm \: A_2  = \; 4 \times 250 \;  cm^2 = 1000 \:  cm^2

\rm \: Pressure \:  P_2 = {F_2}/{A_2} \;  = \cfrac{2 \cancel{0 00 }\:  kgf}{1 \cancel{000} \: cm^2} =  2 \: kgf \: { \:cm}^{- 1}

Now;

\rm  = \dfrac{Pressure \:  Exerted  \: by  \: the \:  Girl}{Pressure  \: exerted  \: by \:  the  \: elephant}

=  \rm \: P_1/P_2

\implies    \rm\cfrac{25 \: kgf \: \: cm {}^{ - 2} }{2 \: kgf \: cm {}^{ - 2} } =  \rm\cfrac{25 \:  \cancel{kgf \: \: cm {}^{ - 2}} }{2 \: \cancel{ kgf \: cm {}^{ - 2}} } = \boxed{12.5}

Thus, the girl's pointed heel sandals exert 12.5 times more pressure P than the pressure P exerted by the elephant.

I aspire this helps!

You might be interested in
What are the units of the following properties? Enter your answer as a sequence of five letters separated by commas, e.g., A,F,G
Marysya12 [62]

Answer:

The sequence is A,B,H,B,F

Explanation:

  • The Standard International unit is Kilogram (kg) and the mass of a body can also be expressed in gram (g).
  • Heat is a form of energy and the unit for energy is joule (J), thus the unit of heat is also joule (J).
  • Density is mass per unit volume where the unit of mass is gram (g) and the unit of volume can be taken as milli-liter (mL). Thus g/mL is the unit of density.
  • The unit of energy is joule (J).
  • Molarity is number of solute in mol dissolved in 1 liter of solution. Thus mol/L is the the unit of molarity.

6 0
3 years ago
A 10kg box putting pushed with a force of 24 Newtons and a fraction of 12N.
Olin [163]

Answer:

The two dogs sitting here are already poor and ignorant

3 0
2 years ago
Read 2 more answers
how do i write this to where it is true? in the blue is a statement and the attached piece is false so i have to make it true an
OlgaM077 [116]

Answer:

cross out the false piece in blue and write the true piece in red

4 0
3 years ago
If velocity is decreasing,then acceleration:
ziro4ka [17]
If velocity is decreasing, then acceleration is in the direction
opposite to the velocity.

If the object is moving in the direction that you call 'positive',
then acceleration is negative.
5 0
2 years ago
For sprinters running at 12 m/s around a curved track of radius 26 m, how much greater (as a percentage) is the average total fo
Snezhnost [94]

Answer:

114.86%

Explanation:

In both cases, there is a vertical force equal to the sprinter's weight:

Fy = mg

When running in a circle, there is an additional centripetal force:

Fx = mv²/r

The net force is found with Pythagorean theorem:

F² = Fx² + Fy²

F² = (mv²/r)² + (mg)²

F² = m² ((v²/r)² + g²)

F = m √((v²/r)² + g²)

Compared to just the vertical force:

F / Fy

m √((v²/r)² + g²) / mg

√((v²/r)² + g²) / g

Given v = 12 m/s, r = 26 m, and g = 9.8 m/s²:

√((12²/26)² + 9.8²) / 9.8

1.1486

The force is about 114.86% greater (round as needed).

5 0
2 years ago
Other questions:
  • 13. A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What power was used?
    7·2 answers
  • Complete the statement with the correct term. As the size of the nucleus increases, more ___ are needed to maintain the attracti
    10·2 answers
  • 6. A man is riding a bike with an acceleration of 5.0 meters per second and a mass of the bike and him combined is 20 kg. What f
    15·1 answer
  • Consider a rifle, which has a mass of 2.44 kg and a bullet which has a mass of 150 grams and is loaded in the firing chamber.Whe
    14·1 answer
  • A heat engine is designed to do work. This is possible only if certain relationships between the heats and temperatures at the i
    14·1 answer
  • In 1898, the world land speed record was set by Gaston Chasseloup-Laubat driving a car named Jeantaud. His speed was 39.24 mph (
    5·1 answer
  • Which diagram best illustrates what happens when electromagnetic waves strike a reflective material? ANSWER: D
    7·2 answers
  • A big red fish with a mass of 20 kg swims with a velocity of 2 m/s toward a small, stationary green fish which has a mass of 10
    13·1 answer
  • Calculate the momentum for the 5 kg bowling ball moving at 6 m/s.
    14·1 answer
  • a 1500 kg vehicle is traveling on a curved, icy road. the road is banked at an angle of 10.0 degrees and has a radius of curvatu
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!