Chapter 13 Answer Key: Friction and Accelerated Motion

Chapter 13: Friction and Accelerated Motion – Key

13.1 Friction

1.  > 196 N

2.  0.306

3.  0.041

4.  < 7200 N

5.  19.6 N

6.  0.85

13.2 Friction & Newton’s Second

1.  0.44 m/s²

2.  (i)  0.41  (ii)  1.1 m/s²

3.  39.2 m/s²

13.3 Friction & Accelerated Motion

1.  0.031

2.  (i)  104 m  (ii)  151 m

3.  48 m

4.  0.19

5.  331 m

6.  0.023

7.  10 s

8.  The person will move

9.  – 1.72 N

13.4 Friction on an Inclined Surface

1.  0.54 m/s²

2.  793 N

3.  22.8°