Final answer:
The force required to hold the book in place against a vertical wall is equal to the weight of the book. The weight of an object is the force exerted on that object due to gravity.
Step-by-step explanation:
The force required to hold the book in place against a vertical wall is equal to the weight of the book. The weight of an object is the force exerted on that object due to gravity. In this case, the weight of the book is equal to its mass multiplied by the acceleration due to gravity.
So, the force required to hold the book in place can be calculated using the formula: F = mg, where F is the force, m is the mass of the book, and g is the acceleration due to gravity.
For example, if the mass of the book is 2 kg, and the acceleration due to gravity is 9.8 m/s², then the force required to hold the book in place is:
F = (2 kg)(9.8 m/s²) = 19.6 N.