Answers to Selected Problems
Chapter 1
| P1-1 | k = 10 N/m | |
| P1-3 (a) | F = 3.48 x + 48 N | |
| P1-5 (a) | Fb(P) = 0.5P + 160 lb | |
| P1-7 (a) | v(t) = −9.8 t + 4 m/s | |
| P1-9 (a) | v(t) = −32.2 t + 161.0 ft/s | |
| P1-11 (a) | v(t) = −75 t + 150 ft/s | |
| P1-13 (a) | v(t) = 10 t m/s | |
| (b) | v(t) = 10 m/s | |
| (c) | v(t) = −10 t + 40 m/s | |
| P1-15 (a) | T(x) = 26.67 x + 30°F | |
| (b) | T(0.75) = 50°F | |
| P1-17 (b) | I = 2 A | |
| P1-19 (a) | Vs = 3 I + 3 V | |
| P1-21 | Vs = 50 I + 0.7 V | |
| P1-23 | vo = 1.5 vin − 4 V | |
| P1-25 | ea = 2.667 ia + 0.667 V | |
| P1-27 | vo = −1000 iD + 12 V | |
| P1-29 (a) | F = 18 N | |
| (b) | V = 0.6 V | |
| P1-31 (a) | A(F) = 4.55 × 10−6F V | |
| (c) | A(200) = 9.091 × 10−4 V | |
| P1-33 (a) | T(V) = 0.04 V − 25°C | |
| P1-35 (a) | T(V) = 18.1 V + 4.6°C | |
| (c) | ΔT = 65.17°C | |
| P1-37 (a) | R = 100 ε + 50 Ω | |
| P1-39 (a) | a(c) = 0.0667 c + 0.0833 | |
| (b) |  |
|
| (c) | a(0.00419) = 0.0836 | |
| P1-41 (a) | T(°F) = 1.8 T(°C) + 32°F | |
| (c) | 68°F ≤ T ≤ 176°F | |
| P1-43 (a) | p(x) = −12 x + 30 psi, l = 2.5 in. | |
| (b) | p(1.0) = 18 psi |
Chapter 2
| P2-1 (a) | I2 + 2 I − 15 = 0 | |
| (b) | I = 3 A or I = −5 A | |
| P2-3 (a) | I2 + 4 I − 21 = 0 | |
| (b) | I = 3 A or I = −7 A | |
| P2-5 (a) | t = 8 s | |
| (b) | t = 9 s | |
| P2-7 (a) |  |
|
| (b) | R1 = 1275 Ω, R2 = 1775 Ω | |
| P2-9 (a) | ||
| (b) | C1 = 200 μF, C2 = 300 μF | |
| P2-11 (a) | ||
| (b) |
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