A man of 700 N stands in the middle of a frozen pond of radius 5.0 m. He is not capable to get to the other side because of a deficiency of friction among his shoes and the ice. To overcome this intricacy, he throws his 1.2 kg physics textbook horizontally toward the north shore at a speed of 5.0 m/s. Determine how long does it take him to arrive at the south shore?