A(n) 692 N man stands in the middle of
a frozen pond of radius 7.5 m. He is unable to get to the other side because of a
lack of friction between his shoes and the
ice. To overcome this difficulty, he throws his
1.5 kg physics textbook horizontally toward
the north shore, at a speed of 7.3 m/s.
The acceleration of gravity is 9.81 m/s
2
.
How long does it take him to reach the
south shore?
Answer in units of s
