in a car crash what are the principles of kinetic energy?
605887
Kinetic energy is energy that a body has by virtue of its atate of motion.\nWhen a car crashes it comes to rest(or slows down), so where does all that K.E. go??\nSome of it is converted to sound energy(the crashing sound you hear), some of it is transferred to the object into which you crash, while the rest in transferred to your car(that is why the car gets damaged)
190711
Well my friend, two theories come into play here.\n1) Things in motion tend to stay in motion.\n2) Energy cannot be created or destroyed\nTherefore, one or both of the objects (depending of the structure and integrity of the objects) will suffer severe or absolute damage as the transfer of kenetic energy to solid matter occurs. (Depending on the speed and velocity)Whether you think so or not, one obect will move or one object will stop.
153070
The short answer is that mechanical energy involves motion of a mechanism as opposed to electrical, chemical, nuclear, heat, and light energy, etc.  As such, it exists in two forms; potential and kinetic energy.  Potential energy is energy of position.  For example, it takes mechanical energy to lift a 100 pound weight one foot (100 ft-lbs of energy) and the system can give up the same amount of energy (less friction) returning to its original position.  Compressing a spring or even gas in a cylinder can also store potential energy that can be returned.  Kinetic energy is energy of motion (1/2mv**2 i.e., one half the mass times the velocity squared).  Energy (including mechanical energy) can be converted to other forms.  For example if you lift one pound of water 778 feet (778 ft-lbs), its potential energy can be converted by dropping it back to ground.  Before release it has maximum potential energy and minimum kinetic energy.  Just before it splatters, it has minimum potential energy and maximum kinetic energy.  Upon splattering, the kinetic energy of the whole mass is converted to kinetic energy of the molecules and the mass heats up one degree F.  Kinetic energy oof motion can also be stored in a rotating flywheel.
310103
Kinetic Energy:\n\nKinetic energy (SI unit: the joule) is energy that a body possesses as a result of its motion. It is formally defined as the work needed to accelerate a body from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that speed.\n\nIn simple cases, this work (and thus the kinetic enrgy) is equal to:\n\n    Ek =.5(M*(V^2))\nwhere m is the object's mass and v is the object's velocity.
765291
Conservation of energy and of momentum are different things. Momentum is always conserved in a collision. \n\nIf the collision is perfectly elastic, kinetic energy is also conserved. Billiard balls are very nearly perfect. (I guess nothing is exactly perfect in this world.)
1108031
Kinetic energy (SI unit: the joule) is energy that a body possesses as a result of its motion. It is formally defined as the work needed to accelerate a body from rest to its current velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. Negative work of the same magnitude would be required to return the body to a state of rest from that velocity.
394496
they use the point of impact of the crash and where the vehicle stopped and measure the distance. using math they can figure out just how fast the car was moving.
534463
All kinds of things. All of a cars mechanisms are based on physical laws. I suppose this is for a school project so it might be enough if you talk about speed, acceleration etc...and maybe about the chemical energy that is being converted to heat energy which is being converted to kinetic energy (in school terms). When going through a curve you can talk about centripetal acceleration etc etc
598306
nothing-\nthe system of atoms inside your car is stationary relative to the baloon.
916458
Kinetic energy is energy in motion and potential energy is energy at rest.
805626
OK, I'll try to help you learn the principle so you can pass the test. My explanations are in ().\n\nA high tech jet car speeds along the desert floor at a constant velocity of 180 miles/hr north.a) what is the net force on the jet car? the jet car hits some sand which causes a drag force on the car of 5000 N to the south. The computer instantly compensates so the jet exerts a thrust force on the car of exactly 5000 N to the north at the same time the car hits the sand. The jet car now... choose ALL that apply: \n\n(There has been drag all along. Since the car has been going at a constant velocity, the car's jet has to be exerting an equal and opposite force to compensate for the drag. If the drag and thrust are equal and opposite there's no net force. Newton's 1st says it will stay in motion at the same speed in the absence of a net force. So now, the net force = 5000 N - 5000 N = 0.) The car \n\nmaintains constant velocity\nmoves with constant non-zero velocity\n\n(I explained all this above.)\nNewton's first law states: When the __ net force__ on an object is zero, the object will __maintain__ constant __velocity__.\nAnother way of saying this is that, if the total force on it equals zero, an object's _acceleration__ will also be zero.\n\nIs it necessary to apply a force to keep an object going in a circle at constant speed? \n\n(The object will want to keep going at constant speed in a straight line because of inertia - without a net force it will do that. The force required to go in a circle is towards the center.)\n\nYes, because the __velocity__ is changing.
393875
The way I see it.... u calculate its impulse with the ground.... mass1*velocity1 (pre-shock)=m2*v2 (after shock) then caculate it's potential energy by newton's law of gravity using v2....(god I'm being a GEEK!)
284573
good link below\n\nhttp://en.wikipedia.org/wiki/Kinetic_theory
480270
Car metal dents easily because it is designed to absorb collision energy.  The more it deforms, the more the impact is disappated- protecting the occupants inside.
887598
Well a very very simplistic demonstration could be shown on a pool table.\n\nIf you shoot the cue ball at a stationary ball (let's call it the 8 ball) across the table, the cue ball has Kinetic Energy, where as, the 8 ball has only potential energy.  \n\nWhen the cue ball collides with the 8 ball, the kinetic energy will transfer from the cue ball to the 8 ball, sending the 8 ball in motion.  Now that the 8 ball is in motion it has Kinetic energy which is a change of form.  \n\nThe Law of Conservation of energy says that energy cannot be created.  So what does that mean?  It means that if the 8 ball is now in motion, it took energy from the cue ball, which means that the cue ball has now lost energy, and will be traveling slower, and if they hit at the right spot (since they are approximately equal in mass) the cue ball can even come to a complete stop upon collision.\n\nHope I didn't lose you!\n\n~~Tyler\n\n\nAlso, an easier example would be a monkey falling out of a tree.\n\nIf the monkey is sitting down eating a banana on the highest branch, he has Potential energy.  If he reaches for another banana and it's just out of his reach and he slips off of the branch, his potential energy is now being converted into kinetic energy.\n\nHopefully theres a pile of leaves on the ground.
855353
kinetic energy is the energy possessed by a body in virtue of its motion\npotential energy is for example the energy of water \nat the top of a waterfall before it is\nconverted to kinetic energy after it goes\nover the edge of the waterfall\ngravitational energy is the potential \nenergy possessed by a body\nby virtue of its height above sea level \nan example of this is the space shuttle \nusing the frictional resistance of the \natmosphere to convert the gravitational\nand kinetic energy into heat in order to land\n\ni hope that this helps
363865
As the car moves along, air passes over the top of the roof, creating an area of low pressure.  The air pressure inside the car, having a higher pressure than outside, then forces the canvas upward.\n\nThe principle is similar to that of an airplane wing.  Of course though, there isn't anywhere enough lift generated to make the car fly.