A(n) 641 N man stands in themiddle of a frozen pond of radius 11.7m. He is unable to get to the other sidebecause of a lack of friction between hisshoes and the ice. To overcome thisdifficulty, he throws his 1.2 kg physics textbookhorizontally toward the north shore, at a speed of6.7m/s. The acceleration of gravity is9.81m/s2. How long does it take him toreach the south shore?