Three people trying to move a box. Which set of forces will result in a net force on the box of 20 N to the right?

we have that from the Question"Three people trying to move a box. Which set of forces will result in a net force on the box of 20 N to the right?" it can be said that
From the Question we are told
Three people trying to move a box. Which set of forces will result in a net force on the box of 20 N to the right?
Generally the equation for Net Force is mathematically given as
Fn=Fx+Fy...
Therefore
The force from the option that give a Net Force of 20 to the right is
[tex]Fn=(28+10)-(18)\\\\Fn=20N[/tex]
Therefore
The set of forces which will result in a net force on the box of 20 N to the right is
Option D
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