I want to make my 2D rigidbodies move smoother!

Hi there, I am building a simple game which consists of 2D objects falling from some height downwards and as time goes on a variable value increases which also adds relative force downwards to the objects to make them fall faster. However I feel the objects aren't falling as smoothly as they should be. I do know about Time.deltaTime, however this should only matter if I am using transform.position or transform.rotation to keep movements synced between frames. I want to know how I can make this game more smoother as I feel it is skipping couple of frames (not very noticeable). The way I see the objects falling is they are leaving their picture of previous frame (i.e the frames are overlapping?). The object is falling and you can see a part of it behind itself. It has RigidBody2D, a destroy script, and it's a sprite (a solid colored image I made from photoshop) no textures just solid white and black colors. There aren't any textures in the whole game for that matter. I have changed the gravity in Physics 2D to a lower value as the objects would fall very very fast with the default -9.81 and it's now -3.81.