Chapter 7 - Work and Kinetic Energy - Problems and Conceptual Exercises - Page 213: 61

$P=386W$

For a constant force, the work is equal to $$W=Fd$$ Substituting known values of $F=836N$ and $d=10.7m$ yields a work of $$W=(836N)(10.7m)=8950J$$ The formula for power is equal to $$P=\frac{W}{\Delta t}$$ Substituting known values of $W=8950J$ and $\Delta t=23.2s$ yields a power of $$P=\frac{8950J}{23.2s}=386W$$