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Jet force
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=== Weight === Weight is the downward force that the lift must overcome to produce upward movement. On earth, weight is fairly easy to calculate: <math display="block">\text{Weight} = mg </math> In this equation, m represents the mass of the object and g is the acceleration that is produced by gravity. On earth, this value is approximately 9.8 m/s squared. When the force for lift is greater than the force of weight, the aircraft accelerates upwards.
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