Beef Stew in Slow Cooker with worcestershire

1/4 cup all-purpose flour 1/2 teaspoon kosher salt 1/2 teaspoon ground black pepper 1 teaspoon onion powder 1/2 teaspoon garlic powder 1 lb beef stew meat ,[...]

1 medium onion , sliced 1 1/2 lbs stew meat 4 large potatoes , pared and cut up 1 lb carrot , pared and sliced 1/8 cup Worcestershire sauce 1/2 teaspoon salt[...]