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Saturday, 26 November 2011

PHYSICAL BALANCE

PHYSICAL BALANCE:
Definition:  It is a device commonly used to measure the mass of an object.

CONSTRUCTION: It consists of a vertical pillar having a horizontal beam. resting on a center knife edge with two pans, which are suspended on two knife-edges near each end of the beam. A long pointer capable of swinging on a scale is attached to the middle of the beam. The physical balance is leveled by means of leveling screws. The beam is set free by rotating the arresting knob. The pointer is adjusted at the center of the scale by means of adjusting screws.

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