The correct answer to the question is :A) Push of 10 newtons accelerates a box experiencing a static friction of 5 newtons.
Step-by-step explanation:
As per third option, the push is given F = 10 N.
The static friction is given f = 5 N.
Hence, the net force applied on the box = F- f
= 10 N- 5 N.
= 5 N.
Here, the applied force is greater than opposing force.The body will undergo acceleration due this net effective force.
In other three options, the applied force is less than the opposing forces.
Hence, the third statement describes properly the effect of force.