A \(20-\mathrm{kg}\) child wants to slide along a horizontal yard toy that consists of a slick plastic sheet covered with a thin layer of water to reduce friction to almost zero. To cause him to slide, you squirt him with a stream of water from a hose.

(a) If the water from the hose exerts a constant force of \(5.0 \mathrm{~N}\) on the child, what is the work done by the water in the interval from \(t=0\) to \(t=1.0 \mathrm{~s}\) ?

(b) What is the instantaneous power delivered by the water at t= 1.0s?