An object has one force acting on it . it is a 33 newton force pointing downward. to create a net force of zero on the object, which force must be applied to it

A force of 33 N pointing upward

Explanation:

In order to have a net force of zero on the object, we must add a force that balances the original force.

We have only one force of 33 N, pointing downward. In order to balance it, we must add a force with same magnitude (33 N) but in the opposite direction (upward).

So, the force we should add is

A force of 33 N pointing upward