With this snippet, you can pull a player to a location...

gistfile1.txt

private void pullPlayer(Player player, Location location)
{
	    Location playerLoc = player.getLocation();

	    playerLoc.setY(playerLoc.getY() + 0.5D);
	    player.teleport(playerLoc);

	    double g = -0.08D;
	    double d = location.distance(playerLoc);
	    double t = d;
	    double v_x = (1.0D + 0.07000000000000001D * t) * (location.getX() - playerLoc.getX()) / t;
	    double v_y = (1.0D + 0.03D * t) * (location.getY() - playerLoc.getY()) / t - 0.5D * g * t;
	    double v_z = (1.0D + 0.07000000000000001D * t) * (location.getZ() - playerLoc.getZ()) / t;

	    Vector v = player.getVelocity();
	    v.setX(v_x);
	    v.setY(v_y);
	    v.setZ(v_z);
	    player.setVelocity(v);
}