A parachute is a device used to slow the motion of an object through an atmosphere by creating drag (or in the case of ram-air parachutes, aerodynamic lift). Parachutes are usually made out of light, strong fabric, originally silk, now most commonly nylon. They are typically dome-shaped, but vary, with rectangles, inverted domes, and others found. A variety of loads are attached to parachutes, including people, food, equipment, space capsules, and bombs.
A drogue chute is used to aid horizontal deceleration of a vehicle including fixed-wing aircraft and drag racers, provide stability, as to assist certain types of light aircraft in distress, tandem free-fall; and as a pilot triggering deployment of a larger parachute.
For my 12th grade school project, I'm planning to research on the effect of vent ratio on the drag coefficient of round parachutes. My idea was to make small model parachutes and drop them from a height, and derive the drag coefficient after certain assumptions. But I also thought it'd be...
I just launched a 2.2kg model rocket that stands about 5 feet tall and has a airframe that is 4 inches in diameter. I am trying to find how much the impact force is when the rocket hits the ground at 16MPH.
Whats the best approach? Momentum? KE? or something else:)
thanks
Summary:: Does the surface area of a parachute affect its drag coefficient? If so, how?
I have been trying to figure out the effect of surface area on the drag coefficient of a parachute. I have designed a lab in which parachutes of different surface areas are dropped and the terminal velocity...
Homework Statement:: so basically, i need to drop a package from a moving plane so that it lands at a given location. the package has a parachute attached to it which opens as soon as it is dropped from the plane. so i need to figure out how much distance before the drop location i need to...
Both Boeing and SpaceX are competing to fly NASA astronauts to the ISS. While they have their contracts already and follow-up contracts are still far away: The prestige to be first will be immense. Before they can fly humans they need to pass an extensive test program. Both capsules land with...
Is a backpack as good as a parachute when jumping out of a plane?
https://www.npr.org/sections/health-shots/2018/12/22/679083038/researchers-show-parachutes-dont-work-but-there-s-a-catch
"Research published in a major medical journal concludes that a parachute is no more effective than an...
The parachute on a race car of weight 8820 N opens at the end of quater mile run when the car is traveling at 35m/s^2
a.What total retarding force must be supplied by the parachute to stop the car to a distance of 1000 m
$\displaystyle d = v_0\cdot t + \frac{1}{2}\cdot a \cdot t^2 $...
Homework Statement
Homework Equations
F= ma
The Attempt at a Solution
For 8, I think the parachute causes Al and Betty to stop accelerating, so they both have the same net force. (Answer A)
F= ma
F=m*0=0
F=3m*0=0
For 9, I feel like Al should experience more air resistance than Betty to...
Hey Guys,
I'm on a rocket team at my university and we are attempting to figure out the force of opening acting on some of our parachutes. Typically this is done using the following equations, in particular, the one in the top right corner.
This is where our trouble begins. In the Recovery...
David Bloom
Thread
Coefficient
Coefficient of drag
Drag
Parachute
Partial
Physics
Rocket
Rocketry
Homework Statement
Homework Equations
F=ma
Sum of force
The Attempt at a Solution
Not sure if my a is correct, but actually, I need to have it in imperial (US) unit,[/B]
As I have looked through the internet and did my research I have found some information on how to calculate the drag coefficient, however none of what I have search for matches what I need. Currently I am doing a physics assignment for grade 12 and I am investigating the physics behind...
Hello, not sure if this is the correct forum to post this under, but anyway. I am planning on sending a gopro around 100,000 feet up. When the balloon pops, I want it to eventually open a parachute and fall down to the ground safely. Although if the parachute opens right away, it could drift...
Homework Statement
a)ii) Calculate the upward force F acting on Baumgartner at this point. (3 marks)
total mass of Baumgartner = 95 kg
g = 9.8 ms-2
b) Describe the shape of the graph between 30s and 70s. Explain the velocity changes in terms of changes in the air through which Baumgartner was...
Homework Statement
Homework Equations
F∝v
The Attempt at a Solution
I chose C because I thought that at time T after opening the parachute, the resisting force on the diver will increase. But it is not so since the answer is B. Is it because the diver has reached terminal velocity? Even so...
Homework Statement
A cargo packed for aerial dropping can withstand an impact speed of 20 mph. A 100 foot diameter circular parachute is used for a particular load. What is the largest load (including the chute itself) that can be accommodated by this chute. [/B]
Homework Equations
Vt =...
this is an exam question and i am not sure about my answer:
a man with a mass of 60 kg is a parachutist :
calculate the acceleration if the air resistance is 1200N
this is how i solved it:
we must take the wieght into consideration so his wieght is : w=mG G=approximatly 10ms^-2...
Hello
I wonder if anyone here might be able to help me. I am writing a children's book called The Wing Giver about a boy who wants to fly and a Spitfire pilot. However words are my thing and physics isn't!
In the book, the boy wants to solve a formula his dad has set him which is to work...
In AP Physics B, for our physics olympics, for one event, we are required to make a paper rocket that will be launched straight up in the air by an air compressor and pump. (60 psi)
We have already assembled the paper rocket, with one cylinder of paper, a cone paper nose, and a load of tape to...
If you had to jump out of something, say a plane or a tall building, what sort of objects would you try to grab onto to slow your decent?
Curtains? A blanket or tablecloth (if you can find one)? Your jacket? A door (or other large, flat object of some sort)?
Homework Statement
So this isn't a homework question, just something my brother-in-law asked me. He is in the Army, and wanted to know an approximate landing force he would experience when he lands. After attempting the problem, and looking things over, I realized it may be harder than once...
Felix Baumgartner ...what a trooper! Question - what caused the radical spinning upon his intial jump from the balloon? No aero drag at that altitude ?? or was there?
Can someone please point me to a deceleration graph over the 7 minutes of terror from the 13,000 mph re-entry speed through to the parachute release and landing of the Curiosity Rover on Mars?
Thanks very much. :smile:
PS: Mods please feel free to move this topic to the appropriate forum...
I knew someone would do it sooner or later. He landed on cardboard boxes, an amazing feat in my opinion. Three different angles of video in the link:
http://www.liveleak.com/view?i=d5f_1337818786
Final approach:
Moment of impact:
I have to make an egg carrying device for and egg drop project.
The only restriction is i am not aloud to use a parachute.
any good ideas?
Thanks,
-Cameron
i'm trying to figure out the work done by a parachute to slow down a car and so far i have come up with:
W = F_{d} * d
F_{d} = C_{d} ρ A_{f} V^{2}/2
and i have equated the loss of kinetic energy to the work done by the parachute, since the velocity is not constant and therefore the work...
Hey, just started learning about forces and having trouble getting my head around forces acting on a parachutist and acceleration due to gravity. I understand that at terminal velocity Fg = Fair friction, my problem is when he opens his chute and starts to float down is he still accelerating to...
Homework Statement
A parachutist of mass 65 kg jumps out of a plane deploys a chute.
When the chute opens, she slows down from 80km/h to 10km/h in 0.8s. What is the foce of the chute on her shoulders at that time?
m = 65 kg
v1 = 80km/h → 22 m/s
v2 = 10 km/h → 2.8 m/s
change in time =...
How would one model flight of simple parachute in 2D?
For example a formula(s) that would effectively allow you to map the parachute's position/velocity/glideAngle over time. I'm imaging dropping the parachute (consider in 2D only to make easier) and then it will be affected by forces...
a 64 kg parachutist falling vertically at a speed of 6.3 m/s impacts the ground, which brings him to a complete stop in a distance of .92 m. assuming constant acceleration after his feet first touch, what is the average force exerted on the parachutist by the ground?
i know:
Vf=0
Vi=6.3...
Hi,
I'm building a weather balloon with some friends and we are wondering how we build the parachute.
We have decided to build one using nylon instead of buying one.
I have purchased 1m x 2m of parachute grade military nylon for about £3 but I haven't a clue how to build it.
The best idea...
Homework Statement
An ideal parachute accelerates all the air it sweeps as it travels, and the air is accelerated from
0 to the parachute's velocity. Using F = dp/dt calculate the force on an ideal parachute of area A as a function of its velocity and the density of air. Assuming you wouldn't...
I was told i have till wednesday to do a project on physics I've never done before in class, this being a regular high school physics class. So i decided to figure out how a parachute affects free fall and the calculations and stuff to show this.
So far I've found an Air Resistance formula...
I'm trying to prove why it is impossible for James Bond to open the parachute 2 seconds before impact and still land relatively unharmed. My argument is that there is no way a parachute can slow Bond from 190km/h to about 40-50km/h in 2 seconds.
I tried searching the web for information on...
I'll post this question here because it isn't a homework question.
I've already solved this problem that I have taken from a physics
book. My question pertains to why would gravity not be accounted
for? (The reason I think no gravity is account for is because the
solution provided by the...
Hey guys;
for a project, I'm researching different parachute shapes and their efficiencies.
My question is what is the best parachute design for the least amount of parachute material (so it takes up less room when stored).
Let the brainstorm-ing begin! :)
Homework Statement
For a brief moment, the human body can withstand accelerations of up to 75g. If a sky diver is unlucky enough to have a parachute fail, and hits the ground with a terminal velocity of 50 m/s, what is the minimum distance over which he can come to a rest (assuming constant...
Hey, I am building a weather balloon with a small payload that will ascend to approximately 105,000 feet, pop, and then fall to the ground.
I am having trouble coming up with a design for a parachute that will deploy after the balloon pops. There is obviously less air at that altitude, so if...
Hello,
I'm still working on my balloning project and now I have arrived at the problem of getting a accurate idea of a descent velocity/time. I am sure that the formula to get the velocity is:
\sqrt{m*g/0.5*\rho*A}
Now density changes with altitude, causing a higher velocity at high...
Hi all,
So I have these two parachute problems that have been giving me problems any aid you can provide would be much apreciated!
Homework Statement
A)A probe is to land on the surface of Mars and I am required to find out the diameter of the parachute.
Given constance:
m=40kg...
Homework Statement
An 80.0kg skydiver jumps out of balloon at an altitude of 1000m and opens the parachute at an altitude of 200m. a) Assume that the total retarding force on the diver is constant at 50.0N with the parachute closed and constant at 3600N with the parachute open, what is the...
Okay so we are going to drop an egg from three stories high. The only materials we are allowed to use is popsicle sticks, glue, string, and garbage bags...HELP!
How are parachutes like this made work:
http://dolloutfits.com/vs/23.jpg [Broken]
Why do the parachutes remain on the sides nicely instead of colliding in the middle?
[b]1. Homework Statement
A parachutist freefalls from a height of 4000 meters above the ground. Graph his distance vs. time as he falls stop your graph when his parachute opens 200 meters
Homework Equations
i tried a couple equations
rate x time=distance
(final velocity)= (initial...
Homework Statement
A model rock is shot into the air. Once it starts to fall a parachute is deployed. Draw a free body diagram of the rocket with the parachute deployed
Homework Equations
The Attempt at a Solution
ok well there is gravity
does the parachute exert a force...
Homework Statement
A 500 g rock falls out of a 75 m tree. It takes it 5s to parachute to the ground. How much friction is upon it?
Homework Equations
Fnet=ma
Fg=mgh
possibly \Deltad=v1\Deltat+.5a(\Deltat)2 and other kinematics formulas
The Attempt at a Solution
I tried to find the net...