Parachute Definition and 76 Threads

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 formulasThe Attempt at a Solution I tried to find the net force...

Homework Statement Basically i need to find the braking distance and time for the deceleration of a vehicle for the following conditions, using a parachute using a parachute, and wheel brakes does anyone know of a suitable formula to calculate this? Homework Equations...

just as a minor thought i brainstormed on the deployment of a parachute in deep space. because their is no air or molecules like that, THAT I KNOW OF. would the parachute deploy? would it expand and fill with anything like on earth? my thoughts were that if sound can't travel in space without a...

Homework Statement How does a parachute help a man hit the ground with a small kinetic energy? Where does the energy go? Explain everything in energy terms. Homework Equations The Attempt at a Solution i think that when the parachute is deployed, the kinetic energy the man has...

Given an parachuter and the system parachuter-parachute-Earth and taking in account the resistance of the air, my question is: is the mechanical energy of the system (parachuter.parachute.Earth) a constant, please explain. And please don't talk just about the parachuter because I wan't to know...

I'm trying to solve a problem which involves the following scenario. Any help would be great! A landing aircraft (mass 14 tonnes) is to be slowed from 300km/hr to 180km/hr in 3 seconds, by the deployment of two identical parachutes at its rear. Determine the diameter of each parachute. The...

I am trying to build a system to activate a servo at a unspecified point in time when a machine and remote looses their signal between another. When the signal is lost between the two, the new system must activate a servo. We are using radio transmitters, but I can't figure out how to tackle...

I am trying to build a system to activate a servo at a unspecified point in time when a machine and remote looses their signal between another. When the signal is lost between the two, the new system must activate a servo. We are using radio transmitters, but I can't figure out how to tackle...

I am trying to build a system to activate a servo at a unspecified point in time when a machine and remote looses their signal between another. When the signal is lost between the two, the new system must activate a servo. We are using radio transmitters, but I can't figure out how to tackle...

1. Homework Statement : A parachutist whose total mass is 100kg is falling at 50m/sec when his parachute opens. His velocity drops to 10 m/sec in a vertical displacement of 40m. What force was exerted by his parachute? 2. Homework Equations : F = ma Fg = m(9.8) This is my first...

Homework Statement A 78 kg person is parachuting and experiencing a downward acceleration of 2.8 m/s2. The mass of the parachute is 5.4 kg. (a) What upward force is exerted on the open parachute by the air? (b) What downward force is exerted by the person on the parachute? Homework...

Ok, I am pretty much out of ideas, throwing up a hail mary looking for some help here, lol. General equation of a parabola is x(y)=ay^2+by+c, i need x(0)=10 and x(5)=0. So C must equal 10, and b=-2-5a. So the equation is now x(y)=ay^2-(2+5a)y+10. Now, from here i must somehow derive the...

Hi there. I am new so I have no idea where to put this. I'd be glad if the moderator can help me put this in the right spot. So here is my question: What makes a parachute safe in a physics sense? I need a proper source. I've been looking for this for hours and I couldn't find anything...

Homework Statement Parachutists open the canopy of their parachutes in order to reduce the speed at which they land on Earth. How large should a parachute canopy be in order to reduce the landing speed to 10 miles per hour? Consider the parachute to be circular, to be descending vertically...

hello all, I recently saw a poster for a competition, the idea is that you get a teddy bear and attach a parachute to it, your bear gets thrown off a tower and the bear which is in the air the longest wins. Obviously i thought that if i researched parachutes on the internet i could find...

1. A parachutist of mass m falls freely until his parachute opens. When it is open he experiences an upward resistance kv where v is his speed and k is a positive constant. The parachutist falls from rest freely under gravity for a time \frac{m}{2k} and then opens his parachute. Prove that the...

problem: A. A small parachute dropped from a 58-m-high cliff falls with a constant velocity of 1.2m/s. 43s after the parachute is dropped, a stone is dropped from the cliff. will the stone catch up with the parachute before it reaches the ground? yes or no? B. how long would it take for the...

Stoned Parachute problem problem: A. A small parachute dropped from a 58-m-high cliff falls with a constant velocity of 1.2m/s. 43s after the parachute is dropped, a stone is dropped from the cliff. will the stone catch up with the parachute before it reaches the ground? yes or no? B. how...

Here's the problem... A car of mass 2000 kg, drag coefficient .3, frontal area 1 sq. meter releases parachute of area Pi sq. meters (diameter 2 m). The inital velocity of the car is 100 m/s. Calculate distance and velocity after 10 seconds. I know how to work this problem for...

Ok I am sure the title caught your attention, but it is not for me, it is for my cat, just kidding. It will actually be for a model rocket I am building. I would like to design a ram-air parachute to control a descending rocket (toggles will be attached to either servos or linear actuators and...

An 85 kg person is parachuting and experiencing a downward acceleration of 2.5 m/s2. The mass of the parachute is 4.8 kg. What downward force is exerted by the person on the parachute? >>What i am [was] thinking << :: Well, i tried to solve it by using by using this method its wrong 'its...

A paratrooper pilot fell 370 m after jumping without his parachute opening. He landed in a snowbank, creating a crater 1.0 m deep, but survived with only minor injuries. Assume the pilot's mass was 75 kg and his terminal velocity was 50 m/s. (a) Estimate the work done by the snow in bringing...

Hi. I'm doing a KS3 coursework experiment whereby I need to investigate the question, 'Does the area of a parachute affect the rate of fall?' Obviously the answer is yes, however the theoretical physicist within me wanted to take this much further, so I attempted to pull together my basic...

http://www.theglobeandmail.com/servlet/ArticleNews/TPStory/LAC/20040410/PLANE10/TPNational/Canada http://spaceflightnow.com/news/n0211/22parachute/ The technology to apply this to commercial aircraft already exists though the Apollo program. Aviation will never be the same. Edit...

Calculating Force exerted on a skydiver when Parachute opens?? Ok. So i want to calculate the force in Newtons that is exerted on a skydiver when the parachute is deployed. I have the deceleration that the parachute causes, the velocity that the skydiver is going right as the parachute is...

is the acceleration of a skydiver free falling(no parachute yet)9.8m/s^2 ? When the skydiver reaches a new lower terminal velocity, what happens to his weight and drag?