A ball rolls down a grassy hill and eventually comes to a stop. Select three of the reasons the ball comes to a stop.
1) Friction: As the ball rolls down the hill, it encounters friction with the grass and other obstacles. This friction opposes the motion of the ball, eventually causing it to come to a stop.
2) Gravity: Although gravity propels the ball down the hill, once the ball reaches the bottom or a flat surface, gravity no longer provides a force to keep the ball in motion. Instead, gravity acts perpendicular to the surface, pressing the ball against it, eventually bringing it to rest.
3) Air resistance: While rolling down the hill, the ball may also experience some air resistance. Air molecules create a resistance force against the motion of the ball, gradually slowing it down until it finally comes to a stop.