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
patriot [66]
3 years ago
15

If there were no air resistance, how long would it take a free-falling skydiver to fall from a plane at 3500 m to an altitude of

400 m , where she will pull her ripcord?
Physics
1 answer:
xxMikexx [17]3 years ago
7 0

By equation of motion we have S = ut + 0.5 at^{2}

Where u = Initail velocity, S= dispalcement, t = time taken, a = acceleration

Here S = 3500-400 = 3100m, u = 0m/s, g = 9.8 m/s^{2}

So, 3100 = 0+0.5*9.8*t^{2}

       t^{2} = 3100/4.9

       t = \sqrt{3100/4.9}

      t = 25.15 seconds

You might be interested in
Which of the following is lightning an example of?
Amiraneli [1.4K]
The answer is electrostatic discharge.
4 0
3 years ago
ounces is In the apothecary system of measurement, equal to one apothecary pound. a) eight b) 16 c) 12 d) four
Tomtit [17]
The answer is one apothecary pound = 12 ounces
6 0
3 years ago
Can 200 watts lift a 100 kg box,and if so how long would it take?
topjm [15]
The only definite number we can tell you is that in order to lift
a 100kg box, you have to somehow provide a force of about
980 newtons (about 220 pounds) pointing upward.  That's the
weight of the box, and you have to lift with at least that much force
just to get the box off the ground.

After that, the answer to your question is 'YES'.  The time it takes
depends on how much force you have available, how far you want
to lift the box, and how fast.

Here are the Physics formulas you have to use:

-- The amount of "Work" you'll do is

    (the amount of force you use) times (how far up you lift the box) .

-- The "Power" (amount of watts) you'll use is

    (the amount of 'work' you do) divided by (the length of time it takes).  

So ...

-- The higher you lift the box, the more 'work' your lift-machine does.

-- The faster the box is lifted, the more 'power' your lift-machine needs.
4 0
3 years ago
I need help with number 2 pls it’s a quiz grade
Eduardwww [97]
2 is correct hope you get it right
8 0
3 years ago
What interests you the most about Social Psychology? What do you think is one of the most aggravating issues that our society fa
puteri [66]
That the field studys the social context in relationships, society, family, school, etc. The way we form relationships, how society affects the relationships we decide to form, how much society influences our decisions, jobs, education( more than we can imagine.)
I believe the most aggravating issue is the police bruality. The fact that the men who are suppose to be heroes, save lives through enforcing the laws, and give protection to the citizens, are instead acting as criminals themselves killing and creating a sense of danger is inexcusable and a solution needs to be made .
6 0
4 years ago
Other questions:
  • Which of the following objects has the most kinetic energy?
    6·1 answer
  • Which of these questions about skateboarding can be answered using measurements?
    9·1 answer
  • Suppose that John lives on a square block that is 180 yards per side, and in the evenings, he walks with his dog around the bloc
    8·2 answers
  • Who does more work - a man who lifts a large box from the ground up into the back of a truck, or a man who puts the same box on
    8·1 answer
  • A light string can support a stationary hanging load of 23.0 kg before breaking. An object of mass m = 2.95 kg attached to the s
    11·1 answer
  • Good experimental design includes a hypothesis that is
    8·2 answers
  • A two-stage rocket moves in space at a constant velocity of +4300 m/s. The two stages are then separated by a small explosive ch
    10·1 answer
  • How does temperature effect density and the flow of convection currents?
    11·1 answer
  • The design of interior spaces is relatively unimportant to good<br> architecture?
    7·1 answer
  • What type of system is best used to observe conservation of mass because all of the mass stays in one place?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!