Question

A meter scale is kept on a knife edge at 50cm mark. A weight of 20 gf is hanging at 80 cm mark and a weight of 50 gf is hanging at 60 cm mark. A weight of 55 gf is hanging at x cm from 0 mark. Draw the diagram for arrangement and calculate x.​

Answer 1

Explanation:

The centre of gravity of a meter scale will be acting at the mid point (50 cm) of the scale.

For the balance, the moment of forces on both sides of knife edge will be equal.

So, mg×(55−50)=25g×(100−55) or m=225gram