No! Not acceleration - But possibly Newtons First Law.
" A body will remain at rest or at a fixed rate of motion unless acted on by a net force".
Using one of yours it would have to be "interaction". The force being applied by the muscles in his legs is overcoming the inertia (resident in many boys) causing forward motion. This force must be applied continually of the boy will soon come to a stop due to gravity and friction.
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