Chapter 3 Answer Key: Constant Acceleration and Accelerated Motion

3.1 Average Acceleration

1. 5.0 m/s²

2. 2.9 m/s²

3. 29 m/s

4. 1.7s

5. 11s

6. 5.1 s

7. 2 g’s

8. 2.21 x 1016 m/s²

9. 1.9 s

3.2 Accelerated Motion

1. 300 m/s2

2. (i) 1.25 m (≈ 1.2 m) (ii) 5.0 m/s

3. (i) 4.5 s(ii) 47 m

4. (i) 37.5 m (≈ 37 m) (ii) 113 m (≈ 110 m)

5. 90 m

6. 29 m/s

7. 5.0 m/s2 deceleration = 8.0 s to stop

8. 3.0 s

9. 46 m/s

10. 5.0 m/s2

11. (i) 2.2 m/s2 (ii) 83 m

12. 73 m

13. 153 m or 150 m

14. 20.8 m or 21 m

3.3 Accelerated Motion (these questions take more time to solve)

1. 94 m

2. 1.3 m

3. Granny makes it!!! (by 0.35 s)

4. 32 m/s

3.4.1 ICBC Road Sense Campaign

1. Cars deceleration = 1.1 gs

3.4.2 Star Trek Discovery Episode “The Vulcan Hello”

1. 62 m/s² or 6.3 g’s