what would life be without friction?
484986
Soccer games would be a lot more like hockey.\n\nBall-point pens wouldn't work.\n\nAuto insurance would be *really* expensive.\n\nEating soup would take all day.\n\nBut Wile E. Coyote *still* would be unable to catch the road-runner.
556094
Friction is not a force... It just is... It only exists when two objects, or things are in contact with each other.\nIf a force is acting on an object to move it, friction acts in the opposite direction.. It's simple as that. Obviously if the force is not greater than the friction, the object will not move.\nSo the direction of friction is opposite to the direction of the bicycle's movement, so in the same "Direction" for both wheels.
151119
well it could...but not as much because there is less friction.
345166
Friction, Heat, Acid.
609398
FRICTION is the energy generated when two bodies have some physical interaction with each other. \n\nGRAVITY is the force of a mass which pulls an object towards its center.
905447
The net force is 0 Newtons. The force of friction is 100N.\n\nThe key here is that\n1. No acceleration.\n2. Horizontal force only.\n\nThis means that the forces are balanced in the horizontal direction. The object isn't accelerating so net F = ma = 0.
484521
one is the frictionless ship. being entirely frictionless is physically impossible, at least on earth. another would be the improbability drive. you cannot travel thru space on pure improbability. another scientific problen is the fact that almost every planet is inhabited by an alien species, and that most are humanoids. a formula developed by a scientist named frank drake. it is an equation for the probability of alien civilizations in this galaxy with intelligences like or above ours. N = N* fp ne fl fi fc fL. each variable is explained thus:The equation can really be looked at as a number of questions:\n\nN* represents the number of stars in the Milky Way Galaxy \nQuestion: How many stars are in the Milky Way Galaxy? \nAnswer: Current estimates are 100 billion. \nfp is the fraction of stars that have planets around them \nQuestion: What percentage of stars have planetary systems? \nAnswer: Current estimates range from 20% to 50%. \nne is the number of planets per star that are capable of sustaining life \nQuestion: For each star that does have a planetary system, how many planets are capable of sustaining life? \nAnswer: Current estimates range from 1 to 5. \nfl is the fraction of planets in ne where life evolves \nQuestion: On what percentage of the planets that are capable of sustaining life does life actually evolve? \nAnswer: Current estimates range from 100% (where life can evolve it will) down to close to 0%. \nfi is the fraction of fl where intelligent life evolves \nQuestion: On the planets where life does evolve, what percentage evolves intelligent life? \nAnswer: Estimates range from 100% (intelligence is such a survival advantage that it will certainly evolve) down to near 0%. \nfc is the fraction of fi that communicate \nQuestion: What percentage of intelligent races have the means and the desire to communicate? \nAnswer: 10% to 20% \nfL is fraction of the planet's life during which the communicating civilizations live \nQuestion: For each civilization that does communicate, for what fraction of the planet's life does the civilization survive? \nAnswer: This is the toughest of the questions. If we take Earth as an example, the expected lifetime of our Sun and the Earth is roughly 10 billion years. So far we've been communicating with radio waves for less than 100 years. How long will our civilization survive? Will we destroy ourselves in a few years like some predict or will we overcome our problems and survive for millennia? If we were destroyed tomorrow the answer to this question would be 1/100,000,000th. If we survive for 10,000 years the answer will be 1/1,000,000th. \nWhen all of these variables are multiplied together when come up with: \nN, the number of communicating civilizations in the galaxy. \n\n\n--------------------------------------------------------------------------------\n\n\nThe real value of the Drake Equation is not in the answer itself, but the questions that are prompted when attempting to come up with an answer. Obviously there is a tremendous amount of guess work involved when filling in the variables. As we learn more from astronomy, biology, and other sciences, we'll be able to better estimate the answers to the above questions. Many of these questions will be addressed in depth in future issues of Enigma.
355725
i think the most useful invention to mankind would be electricity. without electricy, none of our current "conveniences" would be useful. without electricity, we would have no lights, no heat, no indoor hot water, no refrigeraation for food...electricity started it all and I feel it was and is the most useful to mankind.
799637
Well simple really, because there is no friction in space once a mass is in motion it will remain in motion.  Newtons law that for every action there is an equal and opposite reaction is applied here.  A plant for instances is in motion and will remain in motion do to there being no friction,  This is known as stellar drift are moon for instances is drifting away from are plant this is do to three things, 1 mass in motion, 2 gravitational pull, and 3rd but not least no friction to stop it from drifting.  So lets apply this to a space ship, it fires it last burst of thrust newtons thirded law is now applied, now in till the ship hits something it will stay in motion do to no friction in space.
1105780
without any hidden traps, conditions etc
1179277
the importance of physics?? it is very imp cos if there wasn't pysics we wouln't know how things work. there wouldn't be neither electricity nor magnetism. you wouldn't live as comfortable as you live today...is this enough? :)
500031
The normal reaction is different from frictional force.\n\nEven after applying a force, if a body is at rest, we say that there is friction.\n\nWhen no force is applied to cause relative motion, then there is no friction at all.\n\nYou are correct in saying that no force (causing motion) means no friction.\n\nSimilarly if a body is moving with constant speed and no force is needed to maintain that speed in that case also no friction.
568373
As close to heaven as we could get to (as humans) on earth...\n\nThere would be no betrayal, no crime, no divorce, no families torn apart by gossip, no drug abuse, and the things you mentioned above...\n\nCordially,\nJohn\nhttp://www.GodSci.org\n[God and Science]
65458
Life because without meaning understanding and communication would be impossible. \n\nUnderstanding because without being able to integrate perceptions into concepts we are unable to plan, to act other than randomly in response to our environment and we would not survive long. \n\nCommunication because without meaning the symbolic representation of what we perceive would be impossible. Without such symbols we would be unable to benefit from cooperating with others and enjoy all the advantages that provides to our lives.
542734
Meaning moving continually with no additional force needed to overcome frictional or other energy losses.\n\nNo.  It violates the laws of thermodynamics for some process to occur without an energy loss.  If you don't add energy to a system, eventually it will run out of energy.
757884
Einstein said that, someday, in the far future, humans will be like small energy balls flowing without body necessity. Interesting.
49400
It depends on what you consider life.\n\nWhen you die you will shed that body.  Is there something more than just that body there?  I don't know, but if so, as whatever it is it will not be able to interact with the material world as easy as it did.  \n\nIf such things are possible, metaphysicians will figure it out first.  Give metaphysics a read or two.