Q.

For a free body diagram shown in the figure, the four forces are applied in the 'x' and 'y' directions. What additional force must be applied and at what angle with positive x-axis so that the net acceleration of body is zero

1 23N, 30°  
2 2N, 135°  
3 2N, 45°  
4 2N, 45°  

Ans.

(3)

Resultant force