Question

A paper placed in between two books can be quickly pulled out without moving the books.which statement explains this phenomenon

a.) There are no forces acting between the books and the paper.
b.) The pull of gravity on the book is greater than the force of gravity on the paper.
c.) The two books exert force only on each other and not on the paper.
d.) The books have a great deal of inertia and do not move easily

Answer 1

I am guessing that this paper explains something that is enacted by the law of inertia which says that a moving thing stays at rest and a body in motion tends to stay in motion if no force is applied to them. The pulling of the paper would require force but it is not put on directly on the books but to the paper alone. 

Answer 2

d.) The books have a great deal of inertia and do not move easily.

Step-by-step explanation:

From Newton's first law we know that for a resting object to change velocity, a force must be exerted on it.

From Newton's second law we know that the acceleration of any object (that is: its change in velocity) caused by a force, depends on how massive the object is. This is known as principle of inertia:

`F=m.a`, where F is the force exerted, m is the object's mass, and a its acceleration.

Massive objects, like books when compared with a paper, are said to have a great deal of inertia, that is, the force (in this case the friction made by the paper) is not enough to accelerate the books.