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 the 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 the box stationary, find the reading of the weighing machine.
Answer» Solution :we know that NORMAL REACTION = scale reading `"For MAN, T"=Mg-R` For box : `T=mg+R` `Mg-R=mg+R,""2R=(M-m)g` `R=((60-30)xx10)/(2)=150N`