Chapter 7, Problem 15PCE

To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog’s leash with a constant force given by $\stackrel{\to }{F}$ = (2.2 N) $\stackrel{⌢}{x}$ + (1.1N) $\stackrel{⌢}{y}$. How much work does she do on the deg if its displacement is (a) $\stackrel{\to }{d}$ = (0.25 m) $\stackrel{⌢}{x}$, (b) d = (0.25 m) $\stackrel{⌢}{y}$, or (c) $\stackrel{\to }{d}$ = (−0.50 m) $\stackrel{⌢}{x}$ + (−0.25m) $\stackrel{⌢}{y}$?