An orange is being pulled North by a force of 450 N and South with a force of 400 N. What is the net force of the fruit?

The net force would be 50 N.

The net force is the total force that is applied after opposing forces have been cancelled out. The 400 N of pull to the south cancel with 450 N of the northern pull, leaving just 50 N of pull to the north as the net force.

100 pounds is 100 pounds no matter the object or item being weighed