why is it that a fly hovering inside a moving car does not bump against the window?
96096
The plane in which the movement of fly happens is totally irrelevant to the moving vehicle, the centre of gravity is much higher and not at all pegged to anything stationary within the car like ourselves.
626205
ok, it would freeze quickly (not explode-it is made of solids and liquids, which don't expand in vacuum). But for fun, assume it doesn't freeze or die of hypoxia.  Since there isn't any air, there is nothing for the wings to beat against, so it would flap it's wings and just stay in the same place- The motion of the wings might cause it to start rotating, though-so I would imagine the fly (which is a magic fly that doesn't dry up, freeze, or need oxygen) would just spin around in a tiny circle right where it is.
953552
The "the complete physics of a car crash" would be a very long and complicated answer.\nHowever, the specific items you mention (crumple zone, safety belt, air bag) all serve a common purpose in the event of a crash...to lessen the force which is applied to the car/passengers/... at any given in the event off a crash.\n\nImagine you are in a car driving at 60 mph and you run into a solid brick wall.  One way or another, the car and its contents are going to stop.  The faster the stopping action happens, the larger the force acting on the car and the more harm can be done.  If the crash / stopping action occurs very quickly, the change in the overall object's momentum occurs very quickly and results in a large force.  But if you slow down the crash, even for a few fractions of a second, it can significantly reduce the instantaneous force acting on the object, even though the overall impulse applied to the object is the same.\n\nBy using crumple zone, the car "crumples" as it hits something, which slows down ow fast the car comes to a stop.  Using a safety belt and air bags work in a similar fashion to slow how fast a passenger comes to a stop by cushioning the impact.\nThe more effective "padding" is used, the smaller the force experienced by the object.  Think of it like an falling onto a concrete floor versus falling onto a pillow.  The pillow "gives" more on an impact whereas the concrete floor doesn’t move much at all and the impact happens very suddenly.  An eggs will almost certainly break if hitting a concrete floor, but stands a good change of survival if it falls onto a pillow thus illustrating the lessening of the instantaneous force acting on the object even though in both cases the result is the same...the egg comes to a stop.
558814
that's called relative velocity.....for the bee the car was still.....
522890
Yes this happens and it happens because when an airplane lands it displaces air around it with a high pressure and speed.This large volume of displaced air with high speed exerts a high pressure on the car and it flies away from the track
1025041
It will continue to hover because the air that it's wings are beating against is moving at the same speed as the train. This of course is assuming that the premise requires that all windows are shut and the air is still.
664508
because of inertia it will be traveling at 60mph as it leaves the car\nbecause of the fly's body shape theoreticaly it would give it lift assuming that the fly was facing foward\n\nrealisticly it was facing sideways, so the air would be traveling over its body sideways it would have been plummeted into the ground and its wings would have been ripped off
160628
i guess you are talking about very small flies.  well there may be millions of them and you had the impression that these flies are moving at the same speed of your car.
40673
Surface tension, or the attraction of water molecules sideways and inwards at the surface of the water, cause water to act like an elastic trampoline. This lets the animal float without breaking the surface.\n\nTo propel itself forward, the insect's feet must push water backward (for every action of the bug there is an equal and opposite reaction on the water). The rowing action of the legs produces miniature vortices (whirlpools) which move backward from the bug's feet.
181081
That is a very good question.  The weight of the fly is inside the airplane whether it lands or not.  When I asked a similar question years ago, I was told that the weight of the fly is transfered to the surface under it while it is flying.  I then asked: "If that is true, how come when a huge airplane flys over my head I'm not crushed?"  They answered because the weight is dispersed over a large area of the earth.  I don't understand any of that physics stuff.  I will look forward to checking back to see if some egghead will explain it for us.  Good luck.
1058524
"won't you come into my parlor?",said the spider to the fly. the tricky spider is pretty clever,isn't he? he knows the fly will be caught and he'll be able to scamper along and have himself a nice meal!\n       but if the sticky web clings to the fly and traps him,why doesn't it cling to the spider? the answer to this will surprise you. it does! a spider can be caught just as easily in his own web as a fly is.\n       the reason this doesn't happen is that the spider is "at home" in his own web. he knows his way around. and when the web was spun originally, the spider made sure that there would be "safe" threads to use, threads he could touch without sticking to them.\n      there are many kinds of silk that a spider produces. the sticky kind is used in the web to catch its prey. but there is also a non-sticky kind, and this is used to make the strong, supporting spokes of the web. the spider knows which is which, and he simply avoids the sticky ones! he can do this because he has a remarkable sense of touch.
359184
There is no wind.  The conveyor belt isn't moving air to cause lift.  Just because the conveyor belt is moving the plane's wheels doesn't mean it will fly..   Point the plane the other way and it will.
45406
You have to make it areodynamic so that the wind flows and forms a vortex. Basically it should flow in a circle so that the wind flows to push the car forward. THe easiest way would be to put a spoiler on the top of the car at a 45 degree angle with the slant going towards the front of the car. The wind should flow over the spoiler and then get caught behind the spoiler and push it foward.
48985
airplane wings work because of their curvature - the upper surface of the wing is more curved than the lower surface, so air moving over the top of the wing has to take a longer path.  \n\nthis longer path causes the air to thin out over the top surface of the wing, and this leads to a lower pressure on the top surface.  the higher-pressure air on the underside of the wing pushes the wing upwards into the lower-pressure region, just like the higher pressure inside a balloon pushes the balloon outwards into the lower-pressure atmosphere.\n\nanyway, i think you can think about a leaf on a windshield as acting like a wing of sorts.  air will flow faster over the upper surface of the leaf but stay trapped underneath.  if the leaf is solid, then the pressure differential pushes outward on the leaf, away from the windshield.  \n\non the other hand, if there is a slit in the leaf, then the higher-pressure air underneath can move through the slit and equalize the pressures, so there is less force on the leaf pushing it away from the windshield.\n\nas for holes, perhaps if the holes were big enough, you would no longer have the smooth ("laminar") flow over the surface, and instead get turbulent air that causes a vortex to form.  \n\nvortices are lower pressure areas so that might suck the leaf off.  or, a big hole might cause an edge of the leaf to flip up into the airstream and catch some of the air, forcing it down under the leaf and pushing it off the windshield - whereas a slit might still allow the air to flow smoothly over the leaf yet still equalize the pressure.\n\ni'm totally guessing, but i guess it's a reasonable theory.
90020
Every object touching and having good grip on the body of the train, move along with the train.This means that every object inside the train moves with the same velocity as that of the train.Accordingly, fly is also moving with the train. It has gained this speed by sitting on the interior body of the train.According to theory of physics, absolute velocity has no effect and diffrence when the frame of reference is within the object.Therefore fly while flying makes two kinds of motion 1) It is moving along with the train 2) it`s flying in its desired directions.The motions (1) & (2) are true to the observer outside the train.But, motion (2) is true to the observer inside the train because the observer inside the train is also moving along with the train.Moreover, When the fly tries to enter the fast moving train from outside the train, then the probability of striking on the panel (wall) of windows is more with respect to the speed of the train.This is because the fly is not in the speed of the train.You might have observed, some of the men on the platform enter the moving train by moving along with the train for some distance and jump into the train. I think this is enough to comprehend.
104208
I'm pretty sure on a web only some of the web is sticky. The spider just knows where to put its feet. I think... Or maybe its just the opposite of how a fly lands unside down on the ceiling.
321293
possibly you resized the window when it was in a smaller size, then closed the window, so it stays the same. maybe, have seen it before