What would happen if forces didn't exist?
Matter, energy, space, and time, would all have difficulties existing.
What would happen if gravity didn't exist?
Nothing would exist. The reason that atoms, molecules, stars, planets and galaxies exist is because the force of gravity attracts masses together. Anything with mass has a gravitational attractive force with any other body of mass and therefore moves according to that force. Many people do not understand that the reason for the feeling of weightlessness in space or free fall on earth is due to the fact that gravity is pulling you toward a larger mass. Things fall on earth because the gravitational force of earth is stronger than the force you can exert in the opposite direction. In space, astronauts do not "float", they are continuously falling in orbit toward a larger mass. The proportion and scale of the universe makes it seem like one would be still, but in fact one is in an everlasting state of movement due to gravitational forces around them. If gravity didnt exist, there would be no movement and no way to tell if you were moving because there would be no relative objects to observe in order to prove that you were moving. Its all about relativity, and gravity is the fundamental variable, and the least understood variable of the known forces. Try to understand the gravity of the situation.
What happens to the force of gravity when the distance between two objects decreases?
F = G*m1*m2/r^2 decrease r and leave everything else the same means the force increases. and it increases like the square of the (decreased) distance. i.e. halve the distance, and the force then increases by a factor of 2^2 = 4..... -> D cheers edit: the force INCREASES - see the equation i gave.
What would happen if there was no gravity ?
There will be no atmospehere in earth and cosequantly other kind of life.Lets assume that one day,we simply turned off the gravity on earth, and suddenly there was no force of gravity on planet. This would turn out to be a pretty bad day. We depend on gravity to hold so many things down -- cars people, furniture, pencils and papers on your desk, and so on. Everything not stuck in place would suddenly have no reason to stay down, it would start floating.Two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes and rivers. Without gravity, the air in the atmosphere has no reason to hang around, and it would immediately leap into space. Slso, the ocean will empty from water. It would be a tanker with a linkage. . Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space.
What would happen to the gravity between Earth and the Moon if Earth’s radius decreased, but it’s mass stayed the same?
I know you would use G*M*m / r^2, would any of these be effected by changing Earth’s radius? I thought since r is the distance between the two masses’ centers, if Earth’s radius changes, that distance would still be the same, so nothing would happen?
What would happen if the gravitational force were suddenly reduced to zero?
I would like to start the answer by saying that you realize that this could never happen. The Earth has mass, just like every other solid object does (including you). It is the Earth's mass that causes it to have gravity, and so in order to not have gravity the Earth would have to not have mass. But if the Earth didn't have mass, it wouldn't be there anymore!Having said that, though, let's now imagine that we could magically turn off the gravity while leaving the Earth behind. What would happen to the things on Earth depends on how they are attached. As you know, the Earth is rotating at quite a speed (you're moving at over a thousand kilometers per hour at the equator due to the Earth's rotation alone). Now if you spin something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. If the circle is very big, then at first the straight line is almost the same as the circle. However, after a short amount of time, the two paths will be very different, since the circle bends around but the straight line does not.‘Reducing gravity to zero’ is analogous to letting go of the string. Things not attached to the Earth in any other way would fly off into space in a straight line that would take them away from the surface of the Earth. In buildings, people would start floating gently upwards until they bumped into the ceiling. Outdoors, things would start floating away from the Earth gently but eventually go much faster, as their straight lines took them farther and farther away from the circular path that the spinning Earth takes. The Earth's atmosphere itself would also float off into space, for the same reason! Some things (like trees and most buildings) are rooted into the Earth. They would not fly off because they are being held down. In fact, the force you would need to hold on and keep yourself from flying away from the Earth is very weak, only about 0.3% as strong as the force of gravity. However, things which are holding on to the Earth would eventually have problems too, the Earth itself would most likely break apart into chunks and float off into space, since it is only held together by gravity also!
What would happen if gravity were the same on the Moon as on Earth?
What exactly does one mean by “gravity”; is it the acceleration due to gravity, or the force of gravity itself?Acceleration due to gravityThe acceleration due to gravity on a surface of a body is dependent on the mass and the radius of the body. If one wanted to have the same acceleration due to gravity on the surface of the Moon, then they’d have to accomplish one of the two things:Increase the mass of the Moon approximately by a factor of 6.Decrease the radius of the Moon by a factor of 2.45 (square root of 6) while keeping the mass constant.I have no idea how you’re planning to do that, but assuming it’s somehow accomplished:First case — If the mass of the Moon is increased, this could have devastating consequences. Moon’s gravitational force would increase six times, and would collide with Earth. Needless to say, life as we know it would perish.Image Source: ZME Science.Second case — The Moon would become significantly smaller in the night sky. That’s about it. There would be no immediate danger from this, but there might be some long term implications.Force of gravityThe force exerted by Moon on Earth is the same as the force exerted by Earth on Moon. Nothing would happen.
If the force of gravity between the sun and planets suddenly disappeared....?
They would follow the path they were on at the moment gravity was lost. So they would just head off in a fairly straight line. It would be like swinging a ball around you head on a string and just letting go.
What would happen if Newton had not discovered gravity?
I'd like to start this answer with a quote from Einstein.“Its not that I'm so smart, Its just that I stay with problems longer”.Isaac Newton “discovered” gravity because he had a passion to realize the answer. If he didn't do it, some other person who was thinking about the problem constantly would have done it. He got to it first and the others wondering the same thing were like “yeah, that's it!”.People who discover things don't do it overnight. They look at a question that has no logical answer and go on the journey themselves. They don't care about the critics because the critics don't know the answers either. Currently, we are in an interesting point in the study of the cosmos. We have been a skipping record for the last 100 years. We've developed theories to back up the big bang theory but, as we try to find every answer there is, problems arise that prove that we are on the wrong path. What is needed is the new person who started from scratch with a clean blackboard. Someone who doesn't give a crap what someone else thinks yet isn't just pulling answers out of their you know what. It might take 300 years for the realizations to come to fruition but the person doesn't care. They will continue their love of the subject indefinitely. So who is the next Newton? Who will discover how our universe really works? It's been 100 years and we have the internet now. Let's get to the bottom of it all.