Answers

2016-06-20T10:06:01+08:00
N= fg + fn
= 10 units + (- 5 units )
since they pull in opposite direction.

10 units< --- crate ---> 5 units

= 5 units

therefore the net force is 5 units, the direction of force would be the direction where the boy pulling on because he exerted more than 5 units force than the girl. unbalanced force acting on the situation.
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