we had a lab were we built a parachute and was given a lab sheet i have to draw the parachute and label all the forces that act on it... im guessing i need to label weight and the normal force but what other forces do i need to label??? friction?air resistance?
also on a kite, how is a kite similar and different to a parachute??? all i have so far is one stays in the air and one drops but i dont think that is acceptable to put down.
2007-12-18 07:49:46 · 2 answers · asked by molly 1 in Science & Mathematics ➔ Physics
The forces on your parachute are weight ( mg ) down and air resistance up. Air resistance is proportional to velocity, so when the parachute reaches a certain speed the air resistance equals the weight and the 'chute falls at a constant velocity.
If you put a parachute on a string, you could fly it like a kite. And if you strapped on a big kite, you could sail through the air as if you had a parachute or a paraglider on.
Search youtube.com for "batwing" videos for people flying with what are essentially kites.
2007-12-18 07:55:08 · answer #1 · answered by jgoulden 7 · 1⤊ 0⤋
the force (drag) is proportional to the velocity-squared
http://en.wikipedia.org/wiki/Drag_equation
a parachute is designed to slow a guy down as he falls, or a car or whatever, so it's large and strong (to create and withstand the sizable force needed to slow said car or whatever).
this will make it heavy, so a gentle breeze wouldnt produce enough drag to lift the parachute.
a kite is designed to fly without load other than its own weight, so it's small and light, so a breeze can lift it. as it's light it is also weak, and cannot take any loads, so in a big gale, holding a kite, the kite would probably break under the forces involved (just as jumping out of an aircraft with a kite!), while the wind in a parachute would probably be able to toss you around like a ragdoll
designs to fit their purpose
2007-12-18 16:05:49 · answer #2 · answered by Anonymous · 0⤊ 0⤋