An object weighing 5N in air ,weighs 4.5N in a fluid.The buoyant force experienced by the object is how much?need the answer step by step

Weight is a force acting in the downward direction. The buoyant force acts in the upward direction and is subtracted from the weight in the air to give a reduced weight.

SO

Weight in Water = Weight in air- Buoyant Force

Buoyant Force = Weight in air - Weight in water = 5N - 4.5 N = 0.5 N