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Textbook errors - Y1 Mechanics:
https://docs.google.com/document/d/1RtvYyMvLvfX7pWzHYhX-BZqOpZLtjyYr/edit#bookmark=id.30j0zll
updated July 2022 for third printing
Exercise 8A, question 3c, page 120
Amend answer to when k = 10 m not seconds. Fixed in second printing and online.
Exercise 8A, question 4, page 120
The information as given leads to a ridiculous answer of 1.3km in 10 seconds. Working backwards from the max speed of 60 mph leads to a value of k = 1.32, not 13.2. This then gives a more sensible answer of 132m in 10 seconds.
Not corrected anywhere.
Mixed Exercise 8, question 4c, page 128
The worked solutions answer the wrong question, but the book and online versions are correct.
Mixed Exercise 8, question 9c, page 129
The worked solutions answer the wrong question, but the book and online versions are correct.
Chapter 9, Example 5c, page 138-9
Despite the question saying deceleration of 1.5 ms-2, in the working they write a = -15. The working below is correct. This has been fixed in the second printing and online.
Chapter 9, section 9.5, pages 146-7
This section keeps referring to “The force of gravity”. Who wrote this book?? Replace the top of page 147 with “The acceleration due to gravity does not depend on mass”. Gravity is not a force. Weight is a force.
Since you’re at it, at the bottom of page 146, cross out the words “force of” in the bullet point there as well.
Exercise 9E, question 1b, page 151
The worked solutions get the working right but the answer wrong. The book and online book are correct with 23.4.
Exercise 10B, question 5, page 161
The bearings should be 117 and 037 but the book and worked solutions give them to 1dp.
Exercise 10E, question 2, page 171
The worked solutions think it is a string in tension and Q is moving away from P. In fact there is a thrust in the rod as Q is moving towards P. The numerical values are correct but the diagram and equations are wrong.
Exercise 10F, question 2c, page 176
This exercise is riddled with errors on assumptions. Some have been corrected online but not in worked solutions.
The pulley is smooth means the tensions in the 2 parts of the string are equal.
Exercise 10F, question 3d, page 176
The string is inextensible means the magnitudes of the accelerations of the two particles are equal.
Exercise 10F, question 5b, page 176
The string is inextensible means the magnitudes of the accelerations of the two particles are equal.
Mixed Exercise 10, question 9, page 178
This says mass 2kg is in equilibrium. In order to work out the distance travelled, this must be in a straight line, so we need the particle to be starting from rest, not just with constant acceleration. Replace the phrase ‘in equilibrium’ with “at rest”.
Mixed Exercise 11, question 13, page 195
The worked solutions for this question are wrong, due to early rounding, but the new printing of the book and online are correct.
b) the first coefficient should be 1.69 and the last one 273, c) 5990, d) 510 seconds
Review Exercise 2, question 12b, page 199
Deceleration should be 3 ms-2. Fixed in second printing and online.