Posted by Steeve on .
A box weighing 136. N rests on a table. A rope tied to the box runs vertically upward over a massless frictionless pulley and a weight is hung from the other end. What is the force that the table exerts on the box if the weight hanging the other side of the pulley weighs: 2.46x10¯² N ?

Physics 
Elena,
m1•g=N+T
m2•g=T
m1•g=N+ m2•g
N=(m1m2)g