Selected Solutions, Physics 103 Exam File

MATH AND MEASUREMENT
3. ± 0.992
5. 0.75
7. 3´ 9. 10-12
13. 3.2´ 1016
ONE-DIMENSIONAL KINEMATICS
7. -1.1m/s2, -2.5m/s2, -38m
9. 3.7m/s2, 67m, 25m
11. 0.13m/s2, 0.58m, 5.2m, 0.71m/s
TWO-DIMENSIONAL KINEMATICS
5. 57mi at 92o
7. 16mi at 76° , 5.9mi at 132°
9. a
15. 0.36s, 30m/s and -9m/s
17. 3.5m/s, 2m/s, 0.90s, 3.6m
19. 2m/s, -17m/s, 2.8s, 5.6m
19. 8.13m/s
FORCES AND FREE-BODY DIAGRAMS
1. d
3. 150N, 260N, 8m at 104o
11. 24N, 17N, 3.4kg
15. 8kg, 833N
17. 230lb, 240lb, 23
19. 350Nm, 630N, 560N
21. 100kg, 1500N straight up
23. 3000Nm, 1.7´ 105N
25. 2.5m
27. 137N, 206N
WORK AND ENERGY
1. 650N, 222N, 611N, 0J, 22kJ, -22kJ
3. 6.7N, -13.4U, 23.5J, 10J
5. -180MJ, 0, 0, 9900N, 1900N
9. 12kJ, 106kJ, 106N
11. 3.1kJ, 1.6kW, 11kW, 15hp
13. accel. up, no, 0.64, 200m, 7200lb× m/s, -4400 lb× m/s
15. 13.4m, 9.5m
17. c
19. 34J
MOMENTUM/IMPULSE/COLLISIONS
1. 0.45N
5. -1.1m/s, 82%
7. the larger mass
11. 1.7´ 10-25m/s, No, 1J lost
13. 34mph at 11oN of E
15. 13m/s at 125o, -320kJ
CIRCULAR MOTION/GRAVITY
1. 12kJ, 50kJ, 71m, 37m/s
3. 2.1m/s, 590N
5. 41m, -45kJ
7. 30km/s, 1.8´ 1029N× s, 2.7´ 1040kg× m2/s, 6.0´ 10-3m/s2
9. (rB/rA)2, (rB/rA)1/2, (rA/rB)3/2
11. 1/4, 1/4, /12, 1, 2
13. W=9.8N, T=27N, q=21°
ROTATION
1. 20kJ, 2/5, 17m/s
3. 0.55Hz, 20m/s2, 9800N, 26m/s
7. 0.00225kgm2, 1.83J, 33.1rev/m, no, yes
9. 20rad/s, 0.025kgm2, 5.0J, 10J
11. 4.2m/s
SIMPLE HARMONIC MOTION, WAVES
1. 200N/m, 1600J, 0.25Hz
3. 0.1J
5. 11cm
7. 0.995, 1.001
9. 8.9m, 15s, 6s
11. 1.005s
13. 200.668s, 200.658s, 0.01s or better
15. 0.993m, 4.9s
21. -0.2m
23. 437.5Hz, 569m/s, 566m/s, 0.773m, 1.294m
25. 1.3m, 850m/s, 30, 15
27. c
29. 1299.99989MHz, 1300.00011MHz, 220Hz
31. 10kHz, smaller
33. 0.34m, 1070Hz, 340m/s
FLUIDS
1. 10.3m
3. 400kPa, 80kN, 630J
5. 98Pa
7. 8km = 5mi
15. 1470Pa, 79m/s, 180mph
17. a
19. 39Pa, 41m/s
21. 15Pa greater below, 1.3m/s faster above
THERMODYNAMICS
1. 42MJ
3. c
5. 8.6km, 4.4´ 1018m3, 8.8km, 200m
7. P(kPa),V(m3),n(mole),T(K) = (101,160,6610,294), (101,168,6610,310) ,(106,160,6610,310), (202,80,6610,294)
11. 0.0158mole, 485cc, 1.37atm, isobaric
13. 1.2´ 104mole, 320m3, 4.1MJ
15. 13kJ, 18.5kJ, 31.5kJ
17. 9800m3, 99MJ, 250MJ
19. 300J, 1270cc, 380J
21. -459° F
23. d
C
27. 36min
29. 17.2oC
31. 1%, 800m/s
33. 16 min, 110 min
37. 27%, 370J, 270J, -1J/K, +1J/K, yes.
39. 746K, 2s
41. d
C, 4kcal, 14.65cal/K, 0.42cal/K
43. 3470J, 30%