4. name the missing force... a) frictional force b) buoyant force c) weight force d) thrust

4. name the missing force... a) frictional force b) buoyant force c) weight force d) thrust
Answer
Brief Explanations:
The man is pushing the box to the left. In the horizontal direction, there must be a frictional force opposing the applied - force $F_A$. The normal force $F_N$ acts vertically upward, the gravitational force $F_g$ acts vertically downward. The missing force in the horizontal direction, opposing the applied force, is the frictional force. Buoyant force acts in a fluid medium and is not relevant here. Weight force is already represented as $F_g$. Thrust is usually associated with propulsion in engines and is not applicable in this context.
Answer:
a) frictional force