Chapter 6 Answer Key: Mass, Weight and Newton’s Law

6.2 Newton’s Second Law

1.  7.2 kg

2.  12.5 m/s2

3.  0 N

4.  – 610 N

5. 0.0010 N  or 1.0 mN

6.  4.2 m/s2

7.  0.034 m/s2  or 3.4 cm/s2

8.  960 m/s2

 

6.4 Weight & Mass

1.  (i)  150 N(ii)  30 m/s2

2.  (i)  5.0 m/s2 (ii)  49 m/s2

3.  (i)  538 N (ii)  541 N

4.  76 kg

5.  250 N

6.  730 N in both cases

7.  1.4 m/s2

8.  0.49 m/s2

9.   9960 N to 36 200 N

 

6.7 Newton’s Second Law & Accelerated Motion

1.  106 m 2.  625 N

3.  390 N

4.  – 4630 N

5.  5.8 s

6.  37.5 m/s

7.  4.8 s

8.  815 m

 

6.7.1  Calculating the Mass of the Earth’s Atmosphere

1.  5.3 x 1018 kg

 

 

 

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