Box and circle Collider doesn't work

I created two game object.

One is box and the other one is a ball. Then I added collider to them to collision them. But it’s not working.
I searched on the internet and looked for possible solutions and they didn’t work.

*Is trigger unchecked.
*Attached rigidbody2d to the ball.

Any help will be appreciated. Thanks for your interest

one needs to be a rigidbody to trigger collision events