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Certainty
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15inches above ground ; hovering, stabilizing system is assumed in the system.
pantaz said:How quickly does it need to travel those 15 inches?
Certainty said:I see, umm analogy 1, a chair in a form of a 75 % of sphere or circle or a pie(pizza 12 slices) with 4 slices taken out. weights 400lbs , 3 engines 1 in middle 2 on side for stabilizing 10-20 inches above a flat surface. you saying it requires 400lbs of thrust for that?
Lsos said:The amount of force it requires is the same amount that it weighs. So the shape, size, material, color, bling or religious significance is irrelevant...if it weighs 400lbs then it will require 400lbs of force. If it weighs 47901.87lbs, then it will require 47901.87lbs of force to keep it hovering.
Do you really have a degree in Aeronautical Engineering?
Have you taken freshman physics? That is pretty much the level of understanding needed here. If the object is to be floating in place, then it is not accelerating, therefore the net force is zero -- no matter how high off the ground it is.Certainty said:I Understand it requires the same amount of thrust;weight to counter gravity But you did not read what I asked properly... I said 10-20inches above ground. I do not have a degree in Aeronautical Engineering but I will ;
300lbs is equivalent to 1334.6 newtons or 667.3 pounds-force (lbf).
The formula for converting pounds (lbs) to pounds-force (lbf) is lbf = lbs x 4.448.
The amount of lbf required to lift 300lbs is affected by the force of gravity. On Earth, the standard acceleration of gravity is 9.8 meters per second squared (m/s^2). This means that an object with a mass of 300lbs will experience a downward force of 2940 lbf due to gravity. Therefore, to lift 300lbs, an equal amount of force (2940 lbf) must be applied in the opposite direction.
It depends on the individual's strength and the type of lifting motion. For example, a weightlifter may be able to lift 300lbs using lbf, while a person with average strength may struggle to lift that weight using only lbf. In general, it is recommended to use proper lifting techniques and equipment to prevent injury when lifting heavy weights.
300lbs is equivalent to 1334.6 newtons, 667.3 pounds-force (lbf), and 30.5 kgf (kilogram-force). The amount of force required to lift 300lbs using lbf is relatively high compared to other units, but it is important to remember that the amount of force needed also depends on the individual's strength and the type of lifting motion.