Answer:
The force on the book is 250N.
Explanation:
Newton's second law states that the equation for the force is:
![F = ma](https://img.qammunity.org/2021/formulas/physics/college/66xnbespu5t7glxyysllcsc44jbw8uxpg7.png)
In which m is the mass, in kilograms, and a is the acceleration, in m/s². F is the force measured in N.
In this question:
![m = 50, a = 5](https://img.qammunity.org/2021/formulas/mathematics/college/jrgdyf639ftia7e944a79z9af073regs35.png)
So
![F = ma = 50*5 = 250](https://img.qammunity.org/2021/formulas/mathematics/college/zhcg58td4y2sowl8eec112gflrru6igelf.png)
The force on the book is 250N.