Chapter 10 Answer Key: Work and Mechanical Energy
10.1 Kinetic and Potential Energy
1. 2500 J 2.
2.9 x 104 J
3. 4.56 x 10-17 J
4. (i) 38 Ns North (ii) 660 J
5. 2800 J 6. – 19 J
10.2 Work
1. (i) 16 J (ii) 6.6 J (iii) 45 J (iv) 3.08 x 106 J (v) 420 J
2. 8.0 m South
3. Zero Joules, (0 J)
4. 58 000 J 5. 320 J
10.3 Work & Mechanical Energy
1. (i) 1.225 x 103 J (ii) 1.225 x 104 J (iii) 1.35 x 104 J
2. 9.8 x 105 J
3. 19 600 J
4. 37.5 N/kg
5. 5 000 J
6. – 540 000 J
7. – 2500 N
8. – 1100 N
9. 8.2 J
10. – 13.7 J
11. – 510 J
12. 17,000 N
13. 800 N
14. (i) – 1800 N (ii) – 90 J
15. (i) 4.0 x 105 J (ii) – 4000 N (iii) – 4000 N
16. 140 m
10.4.1 Bennu on JPL’s Sentry: A Potential Major Natural Disaster
1. Ek = 5.37 x 1018 J
2. 1300 mega tons of TNT
