2) Weight & Mass : what is the difference between the two? What does it mean to be weightless

1 answer:

4 0

The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it whereas mass is the amount of matter contained in a body. The SI unit of weight is Newton whereas the SI unit of mass is Kilogram.

No idea about weightless maybe the objects not apparently acted on by gravity.

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Answer: f = -12 cm

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$\frac{1}{F} =\frac{1}{f_{1}} +\frac{1}{f_{2}}$