A man of mass 60 kg is standing on a weighing machine kept in a box of mass 30 kg as shown in the diagram, If the man manages to keep box stationary find the reading of the weighing machine.

A man of mass 60 kg is standing on a weighing machine kept in a box of

1.	A man of mass 60 kg is standing on a weighing machine kept in a box of mass 30 kg as shown in the diagram, If the man manages to keep box stationary find the reading of the weighing machine.
Answer» Solution :We know that NORMAL reaction = scale reading For MAN `T-Mg+R=M.0` For box : `T-R-mg=m.0` `CANCEL(T)-Mg+R=cancel(T)-R-mg` `2R=(M-m)g` `R=((60-30)xx10)/(2)=150N`