Power Practice Test

A car engine provides a constant driving force $F$ while the car moves at constant speed $v$ for time $t$. If the time doubles while $F$ and $v$ stay constant, average power is

A winch raises a $m$-kg bucket vertically at constant speed. Trial 1 lifts it height $h$ in time $t$; Trial 2 lifts the same bucket height $h$ in time $2t$. Compare average power.