Does gravity work under water?
yes it does! However there is a smaller acceleration due to a 'buoyant' force pushing upwards. This force is caused by gravity pulling down on the water as well. In air it is almost negligible because it is so light and has very low density. An object less dense than water is not going to be pulled downward because gravity will more likely pull down an equal volume of water because it is more massive. Also, if she floats then she is made of wood and therefore a witch!
How much work does gravity do on a cubic meter of water dropping down the Cherun-Meru?
The world's highest waterfall, the Cherun-Meru in Venezuela, has a total drop of 980 m. How much work does gravity do on a cubic meter of water dropping down the Cherun-Meru? I am told 9.6MJ is not correct (nor 9600000J) what would the correct W=___ in Joules be?? Shouldn't it be a simply multiplication problem?
Does water have gravity? Why or why not?
A small amount of water has almost no gravitational field. Nor does a small amount of dirt or a small rock.But, what gives an object a gravitational field is it's mass, so as the object's mass increases, it will have a higher gravitational field.You and I have gravitational fields, however small, similar to how water in space will have a gravitational field. But the fact is that it's mass is so relatively small compared to the earth and what's around it that other object's gravity severely overpowers it, thus giving it almost zero gravitational attraction.
Is there gravity inside water?
Gravity is a property of mass. If there are two masses in the universe, there is a gravitational force. Though distance between them is an important factor, they will still have a force no matter how small or insignificant.As for your question, water is a mass too so that it will have its own gravity to any object. In daily life though we dont observe it as it is very small due to its mass but what we do experience is the gravitational pull of earth that lies under the water. Basically what I mean is Yes, there is gravity under water caused by earth.I suppose you are asking this question because we can float (swim) on the surface of water and it seems gravity doesnt exist because we are not getting pulled. Actually, that is not the case. We are getting pulled by gravity but inside water, there exists other force (upthrust) that opposes gravity and results the total force acting on us to be zero so that we feel like no force is acting on us. This force (upthrust) depends upon the area of the body. So, if we take a body of very small area but significant mass such as a small stone or a nail, it will be pulled down by gravity even under water since upthrust is not strong enough.
Why doesn't gravity work on smoke?
Haha, I almost laughed at reading this one. Gravity does work on smoke. Only that, the surrounding air is denser than the smoke so it sinks down letting the smoke to rise up.This is similar to dipping a big heavy ball in a bucket almost filled by water. When the ball(heavier than water) goes down it raises the level of water and thus spilling it outside the bucket. Here smoke is the analogous fluid for water and surrounding air of ball. Since the air is present quite up a certain height, the smoke keeps rising until it scatters away to get dissolved in the atmosphere.
What is the value of gravity in water?
Thanks for A2A.Well the value of gravity in water will be the same as on earth surface that is 9.80665 m/s². As the value of gravity changes only with difference in height or depth.The reason you feel that g in water is reduces is because the water. Is a denser medium than atmosphere. Thus it decreases you speed which in turn you can say that acceleration due to gravity is reduced.Also you feel your weight reduced is due to upthrust force that water puts on you. In opposite direction of gravitational force i.e. perpendicularly upward from the surface of earth.I wish this answer will help you.
Is work done under gravity negative?
There is no reason to get horribly complicated here. If a force acts on an object in the direction that it moves, that force does work on the object. If the force acts opposite to the motion, that force does negative work. Gravity can do either positive or negative work.Example:Suppose you drop a brick on your foot. Earth’s gravitational force acted on the brick in the direction that it fell, hence did positive work on it. Where did that energy go? Into the kinetic energy of the brick. Where did that energy go? Your foot absorbed it by doing negative work to stop the brick.Now suppose you lift the brick back up to its initial position (not, presumably, to try that again!). You do positive work on it because you are acting on it with a force in the direction that you move it. What did gravity do while you were lifting it? Earth’s gravitational force was opposite the direction of the motion of the brick, so it did negative work in that case. (And if the brick is no longer moving, those two work contributions are equal, but with opposite signs.)Bonus comment: Often we talk about potential energy in these cases. A change in potential energy is defined as the negative of the work done by a conservative force. Gravity is a conservative force. So when you dropped the brick and gravity did positive work, that decreased the brick’s potential energy - which in turn, went into kinetic energy. When you lifted the brick back to its initial position, gravity did negative work, which, in turn, increased the brick’s potential energy back to its initial value (and, if you wanted, you could do the whole thing again).
How does gravity work? Could you technically bring gravity into space or/and create a zero-gravity zone on Earth (excluding swimming pools)?
Actually, gravity is the least understood ‘force’. The answer to your question - esp. an answer that gave a workable approach to articieal gravity, world be worth a Nobel price or two - plus make the answerer filty rich The only known way of creating real gravity in space is to pile enough mass together. Like, a planets worth of mass to create 1G… so put together a planet, and you would have gravity.Of course, you could fake it by using huge a spinning wheel where people would stay on the inside loop, or you could just jump abord a accellerating spaceship…Zero G on Earth, well, apart from that diving airplane, where you will have free fall - not zero G - you would have to put a mass overhead.A huge mass - a few billion tons would do, esp. if it was Neutronium… of course, you would need something quite sturdy to keep it up, but directly below it, you could get zero G as the Earths and your objects mass would cancel out ..Or, you could invent your own Acme Gravity Generator, reverse the polarity, and enjoy zero G while picking up those Nobel prices