What are importance of platform balance?

Answer 1

A platform balance is an instrument, used to  weigh different things.

The platform balance is a form of equal-arm balance in which two flat platforms are attached to the top side of the beam, one at each end. Such a balance has a rider, or weight, mounted on a bar that has a calibrated scale, is parallel to the beam, and connects the supports of the two platforms. This rider is moved along the bar, its edge marking decimal fractions of the unit weight.

 

Answer 2

What are the parts(with functions) of a Platform balance? i really need your help RIGHT NOW :( tnx