The following lists a number of corrections to the current published version.

**Figure 2.21**: The force at each end is T/l (torque divided by length). The equation stated in the caption is the total twisting forces on the object.

**Example 2.7**: The rotational force here is the sum of twisting forces on the ends of the object.

**Example 2.8**: Similarly 2057 N is the combined twisting forces.

**Chapter 2** **revision question 1**: Option A. 1.4985 T

**Chapter 7 p 164.** The inverse probability weight adjusted risk of hearing loss is 1.04.

**Examples 9.1, 9.2, 9.6, 10.6, 11.15**: These calculations are for the net twisting forces on the object.

**Chapter 11 p265**: T/m not “T/s”.

**Equation 11.3**: similarly shows the sum of twisting forces.

**Answers to revision questions: Chapter 2 question 5**: the correct answer is C.

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