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Is the force of gravity greater less or equal in water than on land?
Wiki User
∙ 16y ago
The force of earth's gravity on an object in water is the same as the force of gravity on it when it's on land. What's up with that? There is an extra force operating in water, and it's called buoyancy. An object put in water, like a rock, will displace an amount of water equal to its volume. The water pushes up on the object with a force equal to the effect of gravity on that volume of water that has been displaced by the object. That makes the object "lighter" when it's under water. The water's buoyancy is operating against the force of gravity. What happens when an object is placed in water and it's overall density is less than that of water? It does something amazing. It floats. Take a tennis ball. Hold it in the hand and drop it. It falls to the ground. Put that same tennis ball in a bucket of water. It floats. (It displaces its equivalent mass of water, though.) Has gravity taken the day off? Nope. Why doesn't gravity pull the ball to the bottom of the bucket? Buoyancy. Hey, since you've got that big bucket of water, get a big rock about the size of that tennis ball or so. Hold it in your hand. Heavy, right? Yeah. Now, holding the rock the same way, lower it into the bucket of water. You should be able to feel the difference in the amount of force required to hold the rock. It's "lighter" all of a sudden when it's under the water because of the effect of buoyancy. Buoyancy vs. gravity. An interesting matchup. Think we can book this into one of the big Vegas casinos and score a mega-buck pay-per-view contract?
Wiki User
∙ 16y ago
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What force makes cold water sink toward the ocean floor?
gravity
Why does water flow downward?
Gravity Gravity is the force that pulls everything downwards towards the centre of the earth. There are no scientific explanations to why and how this force works - it's God's perfect design.
How does gravity affect Earth's water?
The gravity of Earth pulls the water onto the surface of the planet and is responsible for some of the propagation of waves. The gravity of the Moon and Sun pull on Earth's water and are responsible for the tides.
Does freshwater or saltwater have a greater density?
Salt water has a greater density.
How is gravity and mass alike?
because with gravity has a couple types but one of them are water that turns to ice and so does glaciers.
What is the force that causes a marble to sink in water?
Gravity Gravity Density of the marble stone being greater than water causes it to sink by gravitational force.
Does pepper float?
No, because it doesn't have enough density to do that.
Does buoyant force depend on the density of the object?
No, it depends on volume of water displaced, density has nothing to do with it. Think of it like this: if that object wasn't there, wherever it is would be filled with water. Thus, the force on it depends on how much water it pushed out of the way. As much water as it pushed away is how much force the water, as a whole, is exerting on it. the reason denser objects displace more water is this: they are heavier. the Force of gravity is constant, and so the greater mass (density is mass/volume) the greater the downward pull. Thus, the object can push more water out of its way, because it has greater force to push with. Therefore, to reach equilibrium, where the forces cancel, the object must sink to the point that buoyant forces and gravity are equal, and since gravity is greater, it must sink to a greater buoyant force.
What is the bouyancy of air?
Bouyant force was described by Archimedes to be equal to the force due to gravity of the substance displaced by the object. So in the case of a balloon in water the bouyant force is equal to the force of weight of the water that the balloon displaces otherwise known as the (volume of the balloon)*(density of water)*gravity. Hope that helps
What happen when the downward pull of gravity on an object is equal to the upward force of water?
The object floats in the water.
How do you find buoyant force and volume immersed?
Buoyant force is equal to the weight of the volume of water displaced. Buoyant force = [density of water] x [volume of water displaced] x [gravity]
How much force is exerted to lift 750kg of water in the well against the force of gravity?
On or near the Earth's surface, 750 kg of mass weighs 1,653.5 pounds (7,350 newtons). Any force greater than that will lift the water from the well. The greater the force, the sooner the water will reach the top.
Why do you float on water even though gravity is pulling you down?
This occurs due to the upthrust of water. Water exerts an upward force on the body. It is also called buoyancy.
Does gravity and the force of the water cause sediment to move downstream?
not the force of water, but gravity and density does
Can earths gravity increase or decrease?
Yes, it is not a constant. The force of gravity is related to the distance from the centre of the earth so that the force of gravity will be slightly reduced at altitudes. Also, the earth is not a perfect sphere - it bulges at the equator and is flatter at the poles. So the force of gravity will be greater at the poles. The force of gravity is also affected by what is under the surface: if standing over dense rocks, the force will be greater. Finally, the force of gravity is also higher after heavy rainfall. [I guess that is because the water fills up all the air gaps in the soil and so increases its density.]
Can earths gravity increase or decrease explain?
Yes, it is not a constant. The force of gravity is related to the distance from the centre of the earth so that the force of gravity will be slightly reduced at altitudes. Also, the earth is not a perfect sphere - it bulges at the equator and is flatter at the poles. So the force of gravity will be greater at the poles. The force of gravity is also affected by what is under the surface: if standing over dense rocks, the force will be greater. Finally, the force of gravity is also higher after heavy rainfall. [I guess that is because the water fills up all the air gaps in the soil and so increases its density.]
What 2 forces affect you when you float how do these 2 forces compare in size?
There is the downward force of gravity, pushing you towards the bottom of the body of water. The second force is buoyant force which keeps you afloat. Since you aren't sinking then the buoyant force is greater than the force of gravity.
