## 3 thoughts on “3.15”

1. ledrone says:

This problem is the same as 3.16 in the 11th edition

2. melissa_berry says:

the equation given in the book is equal to $-m\ddot x_b$

1. tutorpaul says:

Which equation do you mean? Which edition of the book are you looking at?

It is probable that they defined delta differently than I did. Think about what my solution would look like if I had used $\delta = x - X_b$.