A ball is dropped from the top of a building. It initially moves at 4 point 0 m/s After 0 point 5 seconds, it moves at 3 point 8 m/s What force is responsible for the slowing of the ball?

The ball is moving downward, but its speed decreases from 4.0 m/s to 3.8 m/s, so the net force must act upward, opposite its motion. Air resistance acts opposite the ball’s downward motion and slows it. Gravity acts downward, so it would make the ball speed up rather than slow down.

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