A metre scale is balanced on a knife edge at its centre. When two coins, each of mass are put one on the top of the other at the
mark the scale is found to be balanced at
mark. The mass of the metre scale is found to be
. The value of
is __________.
6
-
-
-
Let the mass of metre scale &
Coin be M and m respectively.
For scale to be balanced ,
R is the reaction force on a knife edge
about knife edge
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