Chapter 8 Answer Key: Momentum, Change in Momentum and Impulse

Chapter 8: Momentum, Change in Momentum  & Impulse (Key)

8.1 Momentum

1.  608 Ns North

2.  2.52 x 10⁵ Ns downstream

3.  401 m/s towards target

4.  (i)  0.800 m/s right    (ii)  160 m/s right

5.  7.7 km

6.  10.5 m  (≈ 11 m)

7.  42 000 Ns

8.2 Change in Momentum

1.  – 62 500 Ns

2.  5.05 x 10⁵ Ns South

3.  0.50 Ns opposite to original direction

4.  – 1020 N

5.  720 m

8.3 Change in Momentum and Impulse

1.  1800 Ns

2.  67.5 N

3.  1.3 m/s East

4.  9.0 m/s South

5.  (i)  3.0 m/s² (ii)  75 N

6.  (i)  18 m/s (ii)  28 m

7.  6 N upwards

8.  6.3 Ns East

9.  1.7 x 10^-3 Ns West

10.  (i)  0.20 s(ii)  5000 s

11.  (i)  4.4 x 10³ Ns East (ii) 4.4 x 10⁴ Ns West

12.  (i)  0.046 Ns opposite (ii)  23.1 N opposite

13.  2040 N

8.4.1  Airbag Failure

1.  9600 N away from the dash

8.4.2  Antarctic Iceberg B-15A

1.  p = 5.48 x 10¹⁴ Ns