Velocity problems

[agile path]

why doesnt the velocity change? trying to make an entity with a humanoid get knocked back slightly after getting hit, but the velocity doesnt change

v is an entity btw

Knockback is supposed to happen on every hit

                    local bv = Instance.new("BodyVelocity")
                    local knockback = (v.Position - char:FindFirstChild("HumanoidRootPart").Position).Unit
                    
                    print(knockback)
                    
                    print(v.Velocity)
                    bv.Parent = v
                    bv.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
                    
                    bv.Velocity = v.Velocity + Vector3.new(knockback*3)
                    print(v.Velocity)```

[cloud condor]

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[silk bobcat]

Danf