Question

Question #715d0

Answer 1

Draw arrows representing the forces acting on the object.

Explanation:

A free-body diagram shows all the forces acting on the object, with the arrows pointing in the direction the force is acting.

On Earth, there'll always be a weight force/gravity force whatever you want to call it.
To stop the object from falling through the table, we need a support force that's equal to the weight force (so same length arrow). These will cancel each other out, so there is no vertical movement of the object.

Force = mass `times` acceleration

As the object is moving with constant velocity there is no acceleration, therefore the overall forces acting on the table must be zero. So the horizontal forces, thrust and drag, must also be equal.