Weight Formulas - How to Calculate Weight from Mass
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Weight of a body is defined force on a mass due to gravity.
If m = mass of an object and if g = acceleration due to gravity Then weight(W) = mg Weight for a particular object is dependent on the acceleration due to gravity in a particular gravitational field.
Example: For a freely falling object of mass 10Kg an upward force of 20N is applied. Find the final acceleration.(g = 10m/s^{2}) Ans: Net downward force = weight of the object = 100 N Net upward force = 20N Net force = 80N in the downward direction. So net acceleration = 80/10 = 8Kg
Question: What will be the weight of an object on moon, if it’s weight is 90N on earth.