An arrow strikes a target causing an internal energy increase of 40.48j...
Here we know that internal energy of arrow has been increased by 40.48 J as it is striking to the target
so here by energy conservation we can say
initial kinetic energy of arrow = final internal energy of the arrow
so here we have
so here since increase in the internal energy is 40.48 J
so the kinetic energy will be given as
none, its a machine