The wind blows a piece of paper across the quad, in a back-and-forth manner

You are walking across campus when you see a colorful piece of paper of mass m = 0.20 kg flying through the air. As the paper enters the science quad, it is moving North at v = 4 m/s.

As the paper goes across the quad, the wind continues to blow it, pushing it through the air. But the force and direction of the wind change as the paper flies.

  1. What is the initial KE of the paper?
  2. How much work does the wind do on the paper as it moves across the quad?
  3. What is the final KE of the paper?
  4. What is the paper's final speed?