Answer to Question #142556 in Mechanics | Relativity for liam donohue

Question

wo people are pulling a table (of mass 3 kg) on a hard surface. One person is pulling with
horizontal force of 10 N to the left, the other with a horizontal force of 20 N at -30 ° to the
horizontal. What is the net force on the table?

Answer 1

Let $F_1=10$ N, $F_2=20$ N, $\alpha =-30°.$

So the net force is $F=F_1+F_2cos\alpha=27.3$ N.