Two books of mass m1 = 6.9 kg and m2 = 3.8 kg are stacked on a table as shown in the figure below. Find the normal force acting between the table and the book on the bottom.

im confused where to start

weight above is....m1*g+m2*g, right?

To find the normal force acting between the table and the book on the bottom, we need to consider the forces that are acting on the book. The normal force is the force exerted by a surface to support the weight of an object resting on it. In this case, the weight of the book is balanced by the normal force.

1. Start by identifying the forces acting on the book:
- Weight (mg): The force due to gravity acting on the book, where 'm' is the mass of the book and 'g' is the acceleration due to gravity (approximately 9.8 m/s^2).
- Normal force (N): The force exerted by the table to support the weight of the book.

2. In this case, we have two books stacked on top of each other. The weight of the upper book will be supported by the lower book, while the weight of the lower book will be supported by the table.

3. To calculate the normal force acting on the book on the bottom, we first need to calculate the total weight of both books combined. Add the weights of both books:
Weight (total) = (m1 + m2) * g

4. Since the lower book supports the weight of both books, the normal force exerted by the table on the book is equal to the total weight of both books:
Normal force = Weight (total)

5. Plug in the values of the masses given in the problem statement to calculate the total weight and, consequently, the normal force.

It's important to note that if there is friction between the table and the book, an additional force would need to be considered. However, since friction is not mentioned in the problem statement, we can assume there is no friction present.