Stan’s displaceent is 0 km because he ends his walk where he started.
Answer:
<em>down, backwards, and outwards.</em>
Explanation:
For a hornet that is accelerating in flight, this means that there is a net forward motion at a relatively constant vertical height above the ground.
For this flight, the <em>wings beat downwards to counter the weight of the hornet due to gravity</em>, keeping it at that height above the floor.
For the hornet to accelerate forward, there has to be a net backwards force by the wing on the air. This backwards force accelerates tr forward due to the absence of an equal opposing force in the opposite direction save for a little drag.
The wings also beat with forces directed outwards to provide centripetal force to keep the hornet stable. <em>The absence of this would cause it to spiral out of control.</em>
Average acceleration is the change in velocity divided by an elapsed time.
