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Why can you lift heavy objects in water that you couldn't lift outside of water?
Wiki User
∙ 9y ago
It's all to do with forces. Everything on the planet is exposed to the force of gravity pulling it down. That force can be overcome quite easily. Imagine you have a heavy box pulling towards the earth with a force of 40N (N = Newtons - the measurement of force). It's hard to carry, you have to overcome 40N of 'pull' to do it, but you can put it on a table without it crashing through. This is because the table pushes back with exactly the same amount of force. If you put it on the floor, the floor pushes back with the same amount of force. If this didn't happen we'd have all been pulled to the Earth's core by now! Let's call this pushing back force upthrust.
So if you put an object on a solid the upthrust equals gravity and the object doesn't move.
What about water? Water has an upthrust, just not as much as a solid object. So our 40N box when put in water won't have the full 40N upthrust that it had on the table and sit on the surface. Instead it might have an upthrust of 20N. So the box sinks till it reaches a solid. But to pick it up will only need 20N of force, because the water pushing up at 20N will do half the job for us. It takes less force to move and so it feels 'lighter'.
So it's easier to move something in water because the upthrust of the water is included in the number of Newtons of force that you need to use.
Wiki User
∙ 9y ago
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Why is it inaccurate to say that all heavy objects will sink in water?
because if the heavy objects have a round bottom they will float
Why do objects sink slow in salt water than in fresh?
salt water, as you know is very heavy, by saudia ariabia, the water is so dense, you just float
Why does a styrofoam ball floats in water?
Styrofoam is lighter than water, so it floats. In nature, heavy objects are more effected by gravity, so they are forced down.
What is the difference between an objects that float and the objects thasink in water?
Objects that float in water are less dense than water; while objects that sink in water are more dense than water.
What can you do to heavy objects to make them float?
An object can float on water only if its density is less than water.(Archimedes principle). So, to make an object float, its density should be low. For this purpose, its mass should be less and volume should be greater(d=m/v), so to make heavy objects to float, their volume should be as less as possible. For more details, contact at saqibahmad81@yahoo.com
Why is it inaccurate to say that all heavy objects will sink in water?
because if the heavy objects have a round bottom they will float
Why do heavy objects sink in water?
Objects sink in water because they are denser than water, not necessarily because they are heavier.
What can sink in water?
heavy objects than water can sink in water
Why is it incorrect to say that heavy objects sink in water?
It is incorrect to say that heavy objects sink in water because... A big slab of wood is heavy, right? Wood floats. For one example.
Objects sink in water because they are heavy true of false?
False. Objects sink in water because they are more dense than water.
How are water buffalo helpful to humans?
they help by pulling heavy objects
How is erosion different from water and glacier erosion?
Wind does not carry heavy objects.
How wind erosion different from water and glacier erosion?
Wind does not carry heavy objects.
How is wind erosion different from water and glacier erosion?
Wind does not carry heavy objects.
How is Pascal's law used?
It is used to move heavy objects that can't be lifted by a human. You use water to move the heavy object.
Can dogs get sick from toilet water?
who couldnt
What are used in electric motors and other things to lift up heavy metals and steel objects?
Water
