http://www.ck12.org Chapter 9. Energy and Force Version 2
2..
3..
4..
5..
- a. 7. 18 × 109 J b. 204 m/s
- a. 34 m/s @B; 28 m/s @D; 40 m/s @E; 49 m/s @Cand F; 0 m/s @Hb. 30 m c. Yes, it makes the loop
- a. 2.3 m/s c. No, the baby will not clear the hill.
- a. 29,500 J b. Spring has compressed length of 13 m
10.. - a. 86 m b. 220 m
- a. 48.5 m/s b. 128 N
- 0.32 m/s each
- a. 10 m/s b. 52 m
- a. 1. 1 × 104 N/m b. 2 m above the spring
- 96%
17.. - a..008 m b. 5.12◦
- 8 m/s same direction as the cue ball and 0 m/s
- vgol f=− 24 .5 m/s; vpool= 17 .6 m/s
- 2.8 m
- a. 0.57 m/s b. Leonora’s c. 617 J
- a. 19.8 m/s b. 8.8 m/s c. 39.5 m
- a. 89 kW b. 0.4 c. 15.1 m/s
- 43.8 m/s
26..
27..
28.. - a. 3. 15 × 105 J b. 18.0 m/s c. 2.41 m d. 7900 J
- a.v 0 /14 b.mv 02 /8 c. 7mv 02 /392 d. 71%