Physics - NLM Question with Solution | TestHub

A boy sits in a chair connected to a rope that passes over a frictionless pulley. He pulls the loose end of he string with such a force that the spring scale reads 250 N. The boy's weight is 320 N, and the chair weighs 160 N. The force that the boy exerts on the chair is (Take $\mathrm{g}=10\mathrm{m}/{\mathrm{s}}^2$ )