Final Answer:
The book would take approximately 3.4 seconds to reach the ground if dropped from the top of the Willis Tower.
Step-by-step explanation:
To determine how long it would take for the book to reach the ground, we need to use the equation for free fall:
t =√(2h/g)
where t is the time, h is the height (in this case, the height of the Willis Tower, or 442 m), and g is the acceleration due to gravity (which is 9.8 m/s²).
Plugging in the values, we get:
t = √(2 x 442/9.8)
t = √(2 x 45.4/9.8)
t = 3.4 second
So, it would take approximately 3.4 seconds for the book to reach the ground if dropped from the top of the Willis Tower.