How can I get velocity of the collider?

Questions & Answers
1

I’m trying to get the velocity of the collider but getting an error? How can I do this?
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2

Try using:

if (colInfo.collider.GetComponent<Rigidbody2D>())
        rb.velocity = ((rb.velocity) / 2) + colInfo.collider.GetComponent<Rigidbody2D>().velocity;