The forces exerted on an object are shown. A box has an arrow pointing right labeled F and an arrow pointing left labeled 8 N.

If the object moves left, which statement is correct about force F?

It is equal to 8 N.
It is equal to 10 N.
It is less than 8 N.
It is greater than 10 N.

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up