Ahoming pigeon starts from rest and accelerates uniformly at +4.00 m/s squared for 10.0 seconds. what is its velocity after the

'  +4 m/s² ' means that the pigeon's speed is  4 m/s greater every second.

Starting from zero speed, after 10 seconds, its speed is 

                           (10 x 4m/s)  =  40 m/s.

We can't say anything about its velocity, because we have
no information regarding the direction of its flight.

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