22. As shown above, two students sit at opposite ends of a boat that is initially at rest. The student in the front throws a heavy ball to the student in the back. What is the motion of the boat at the time immediately after the ball is thrown and, later, after the ball is caught? (Assume that air and water friction are negligible.)
Immediately
After the Throw
(A) Boat moves forward
(B) Boat moves forward
(C) Boat moves forward
(D) Boat moves backward
(E) Boat moves backward
After the Catch
Boat moves forward
Boat moves backward
Boat does not move
Boat does not move
Boat moves forward