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
antiseptic1488 [7]
3 years ago
10

When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal speed. Once he has reache

d terminal speed: a. his speed is equal to g. b. the force of air drag on him is equal to his weight. c. the force of air drag on him is equal to zero. d. his acceleration is equal to g. e. the force of air drag on him is equal to g.
Physics
1 answer:
Masteriza [31]3 years ago
3 0

Answer:

b) True.    the force of air drag on him is equal to his weight.

Explanation:

Let us propose the solution of the problem in order to analyze the given statements.

The problem must be solved with Newton's second law.

When he jumps off the plane

     fr - w = ma

Where the friction force has some form of type.

     fr = G v + H v²

Let's replace

     (G v + H v²) - mg = m dv / dt

We can see that the friction force increases as the speed increases

At the equilibrium point

      fr - w = 0

      fr = mg

      (G v + H v2) = mg

For low speeds the quadratic depended is not important, so we can reduce the equation to

     G v = mg

     v = mg / G

This is the terminal speed.

Now let's analyze the claims

a) False is g between the friction force constant

b) True.

c) False. It is equal to the weight

d) False. In the terminal speed the acceleration is zero

e) False. The friction force is equal to the weight

You might be interested in
How many seconds of space should you keep between you if you're driving a 100 foot truck 30 mph?
Marrrta [24]

Answer:

<em> The space in seconds that will be kept = 2.27 seconds</em>

Explanation:

S = d/t..................... Equation 1

making t the subject of formula in the equation above,

t = d/S.................... Equation 2

Where S = speed, d = distance, t = time.

<em>Conversion: (i)if 1 mph = 0.44704 m/s,</em>

<em>                 then, 30 mph = 30×0.44704    </em>

<em>                = 13.41 m/s</em>

<em>               (ii) If 1 foot = 0.3048 m</em>

<em>            then, 100 foot = 30.48 m.</em>

<em>Given: S = 30 mph = 13.41 m/s, d = 100 foot = 30.48 m</em>

<em>Substituting these values into equation 2</em>

<em>t = 30.48/13.41</em>

<em>t = 2.27 seconds.</em>

<em>Therefore the space in seconds that will be kept = 2.27 seconds</em>

7 0
3 years ago
Megan was doing time trials on her bike around a 400m horizontal track. She took 32 seconds to travel 400m. What was her average
Mars2501 [29]
To find average speed, we divide the distance of travel (in this case, 400 metres) by the time she took, 32 seconds.  Therefore: 12.5 seconds is her average speed.
5 0
3 years ago
Read 2 more answers
By what are isotopes identified?
pashok25 [27]
BBBBBBBB!!!!! ATOMIC MASSES :D
4 0
3 years ago
A small 25 kilogram canoe is floating downriver at a speed of 1 m/s. What is the canoe’s kinetic energy?
Helen [10]
Kinetic energy = 1/2mv^2

=1/2(25)(1^2)
= 12.5J
4 0
3 years ago
Carbon has six protons. which model shows a neutral atom of carbon?
Likurg_2 [28]

Answer:

Hi myself Shrushtee

Explanation:

Neutral carbon-12 (or any carbon atom) has 6 electrons with a total negative charge of 6e- orbiting a nucleus with a total positive charge of 6e+, so that the total net charge is zero. The nucleus is made up of 6 protons, each with a positive charge of e+, and 6 neutrons, each with zero charge.

please mark me as brainleist

7 0
3 years ago
Read 2 more answers
Other questions:
  • Please give me the answer of this​
    8·1 answer
  • Two truckers are traveling directly away from each other at the same speed. If one trucker sounds her horn at a frequency of 221
    12·1 answer
  • Red, yellow, and blue are
    7·2 answers
  • A small block has constant acceleration as it slides down a frictionless incline. The block is released from rest at the top of
    9·1 answer
  • Examine MSDS for hydrogen peroxide 3% and hydrogen peroxide 30% from the same manufacturer. Compare the information contained in
    10·2 answers
  • A spherical balloon is being inflated and the radius of theballoon is increasing at a rate of 2 cm/s.(A) Express the radius (r)
    11·1 answer
  • Convert an acceleration of 1km/h^2 into cm/8^2?
    8·1 answer
  • Give an example of a negative slope.
    14·2 answers
  • Need help again PLEASE HELP!!!!
    12·1 answer
  • A 1kg object at the surface of the earth weighs 9.8N. (F=ma) Prove this by using the formula Fg = Gmm/r2. (Find the radius and t
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!