Integrating to Find Work

Timmy and his dog Lassie were playing in the park when Timmy accidentally fell down a 40 ft deep well. Pretend there's pillows or something at the bottom so Timmy doesn't die.

Hearing his shouts for help, Lassie began to pull on the 0.4 ft/lb rope that stretched from the top of the well to the bottom. Timmy, seeing the rope begin to move, grabbed on.

Lassie pulled all 80 lbs of Timmy out of the well on her own.