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
Elena L [17]
3 years ago
8

The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid. Find the t

erminal velocity (in meters per second and kilometers per hour) of an 80.0-kg skydiver falling in a headfirst position with a surface area of 0.140 m2.
Physics
1 answer:
AVprozaik [17]3 years ago
5 0

Answer:

v=115 m/s

or

v=414 km/h

Explanation:

Given data

A_{area}=0.140m^{2}\\  p_{air}=1.21 kg/m^{3}\\  m_{mass}=80kg

To find

Terminal velocity (in meters per second and kilometers per hour)

Solution

At terminal speed the weight equal the drag force

mg=1/2*C*p_{air}*v^{2}*A_{area}\\   v=\sqrt{\frac{2*m*g}{C**p_{air}*A_{area}} }\\ Where C=0.7\\v=\sqrt{\frac{2*9.8*80}{1.21*0.14*0.7} }\\ v=115m/s

For speed in km/h(kilometers per hour)

To convert m/s to km/h you need to multiply the speed value by 3.6

v=(115*3.6)km/h\\v=414km/h

You might be interested in
An isotope of an element will be radioactive if it has an unstable ratio of____and_____
sammy [17]
Neutrons and protons
5 0
4 years ago
The height of the upper falls at Yellowstone Falls is 33 m. When the water reaches the bottom of the falls, its speed is 26 m/s.
Klio2033 [76]

Answer:

Speed of water at the top of fall = 5.40 m/s

Explanation:

We have equation of motion

v^2=u^2+2as

Here final velocity, v = 26 m/s

a = acceleration due to gravity

a=9.8m/s^2 \\

displacement, s = 33 m

Substituting

26^2=u^2+2\times 9.8 \times 33\\\\u^2=29.2\\\\u=5.40m/s \\

Speed of water at the top of fall = 5.40 m/s

3 0
4 years ago
The period of sound wave coming from an instrument is o.oo2. What is the frequency of the sound
Maslowich

The frequency of the sound is 500

5 0
3 years ago
Liquids, when heated,
iren2701 [21]

Answer:

d

Explanation:

According to me answer is d but gas expand more than others

6 0
3 years ago
The transfer of heat is through direct contact of particles is called
mixas84 [53]

The answer would be Conduction!

Hope this helps!!

8 0
3 years ago
Other questions:
  • The 3.00 kg cube in fig. 15-47 has edge lengths d 6.00 cm and is mounted on an axle through its center. a spring (k 1200 n/m con
    8·1 answer
  • What is charging by contact ​
    11·1 answer
  • All of the waves in the electromagnetic spectrum are _______ waves.
    14·2 answers
  • A positively charged body exerts an electric field that causes a positively charged particle to move away from it. If work is do
    11·1 answer
  • PLEASE HELP ME!!!!!!!!!!!!!!!!!!!!! 80 POINTS!!!!!!!!!!!!
    6·2 answers
  • Name these polyatomic compounds
    5·2 answers
  • A skydiver has a mass of 110 kg. At what speed will she have a momentum
    13·2 answers
  • School homework about multiplying fractions <br><br>worth 30 brainly points​
    7·1 answer
  • Why is scalar quantity negative charges is not possible​
    14·2 answers
  • What is the period of a 1.4-m pendulum?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!