Is it easier to lift a rock in water rather than lifting a rock in air?
An object submerged in a liquid or gas has an upward force, called buoyancy, acting on it that is equal to the weight of the liquid or gas displaced by the object. For example, pure water weighs about 62.4 pounds per cubic foot. Therefore, an object with a volume of 1 cubic foot that is completely submerged in pure water has an upward force of 62.4 pounds acting on it, making it feel 62.4 pounds lighter while it is completely in the water.
Pulleys exist on wells to make it easier to remove the bucket. Once the bucket has gone down to the water, it is heavy and hard to lift straight up. So the pulley allows the person to pull down and/or at an angle to make the lifting easier. A block and tackle (a network of pulleys) could be used here to make the lifting even easier.
Pulleys make lifting things easier. example: If you want to lift 100kg you don't want to lift it with your hands, so you use a pulley. The best choice would be to use a pulley with 4 wheels. Using this would make the effort to lift the 100kg about 75% easier. So lifting the 100 kg with a pulley would make the object be about 25 kg. That is why pulleys are important.
Why does it seem easier to push a box up an inclined ramp into the back of a truck rather than just lifting it up into the back of the truck?
Cranes with electromagnetic lift are known as electromagnetic cranes. Such cranes are used widely in lifting and moving scrap metal. Even in a production line of many products, electromagnetic cranes are used to lift and move the metal objects. Electromagnetic cranes are particularly simple and have many advantages over other lifting tools. They are both faster and easier to work with.
This depends on if you were lifting things from day one. If you are use to say lifting 50lbs at a time then lifting 50lbs will not bother you nor the baby at 5months. But if you do not do any lifting, then it isn't a good idea to up and start lifting things that are heavy. Most doctors would say not to lift over 20lbs. That is about the weight of a toddler.
If the question is asking "for what reason would a person lift a heavy stone immersed in water as opposed to air?" then the answer is buoyancy. When immersed in water there will be an upward force on the bottom of the stone due to the volume of water it has displaced. This upward force will make the stone seem lighter to the person lifting it by decreasing the amount of force they need to…
Why is it easier to pull a submerged boat anchor to the surface than it is to lift it onto the boat?
Great question!!! It's easier to lose water weight than fat because when you drink water your body absorbs the nutrients and minerals needed. The water it's self will make you weigh a few more pounds (depending on the amount consumed). Later on the water will become waste and you will have to urine. As you urine all of the water that was consumed will leae your body and you will become less heavy. Fat on…