Air resistance is a nonconservative force. It always opposes the motion of an object. An airplane flies from New York to Atlanta
and then returns to its point of departure. The net work done by air resistance during this round trip ___________.a. is negative for slower speeds and positive for higher speedsb. is positivec. is negatived. is zeroe. is negative for higher speeds and positive for slower speeds
When the magnitude of force is multiplied with the force vector's projection along the direction of the vector of displacement which is negative as it is a resistive force we get the work done.
As the wind is acting in opposite direction of the force which is being applied by the plane the work done will be negative. Also, the net work will be the sum of many smaller negative quantities.
15m/s is his running speed which is faster than the around 28mph limit for humans and he stops in 3 seconds with division he slows down at a rate of 5 meters per second which means he loses 5m/s velocity per second so 5meters per second per second
