p. 247 3) a. 636 N b. 475 N c. 678 N d. 656 N (Hint: convert 1000 km to m)
4) 6.5 m/s^2 5) 5.98E24 kg
p. 64 3) a) 8.0 m/s b) 1.63 s
p. 65 2) 11 m
p. 68 20) 8.6 m/s 21) a) -15 m/s b) -38 m 18) 220 m 23) 17.5 m
p. 44 2) 3.1 km 3)680 m north
p. 47 1) 24 s 2) 6.2 s 3) a) 2.50 m/s south b) 2.27 m/s north c) 0
ANSWERS TO END OF COURSE FINAL REVIEW
1) 9.09 m/s 2) 6 m/s^2 3) 9.8 m/s^2, 29.4 m/s, 44.1 m 4) 0.1 m/s^2 5) 50 N
6) 980 N 7) equal magnitude, opposite directions; you also have friction
acting on you 8) 16 kg-m/s 9) 2 m/s 10) 4.2 m/s 11) 0.5 m/s 12) 75 N, 75
N 13) 4 J 14) 24 J 15) 0 J, 300 J 16) 0.8 m 17) d 18) a. +250 J b. +10
J c. -40 J d. 200 J 19) 1500 J 20) 4 m 21) 1.5 A 22) 6 A 23) 8.3 A 24)
more resistance
WS 32-1 1) 9E9 N 2) -2.25E9 N
p. 398 46) 2.0 Hz, 0.50 s, 0.30 m/s 47) 446 m 48) 0.129 m to 1.73 m
p. 357 2) a. 4.0E4 J b. 0.53 or 53% c. yes, because eff. is less than 1
p. 355 2) 0.59 or 59% 3) a. 0.247 or 24.7% b. 4.9E4 J
p. 349 6) a. 9.06E4 J b. 0 J because it is cyclic d. -7.55E4 J 7) -28 J
p. 346 1) 33 J 2) -143 J 3) 1.00E4 J 4) 0 J, 344 J 5) 1.74E8 J
G-Force Calculations: 5) 9.8 N 6) your weight
p. 247 3) a. 636 N b. 475 N c. 678 N d. 656 N (Hint: convert 1000 km to m)
p. 166 2) 38.8 m/s Hint: Plug the values into the KE equation and solve for v
by square rooting
3) the bullet with the greater mass; 2 to 1 ratio (divide)
4) 2.4 J, 9.6 J; the bullet with the greater speed; 4 to 1 ratio
Hint: convert g to kg first
p. 168 1) 7.8 m Hint: Work = Force x Distance = Kinetic Energy gained
2) 21 m Hint: Find KE first (4000 J),
then KE = Work = Net force x Distance
4) 3.0x10^2 N Hint: Like #2, but solving for net force, not distance
p. 214 5) a. 3.0 kg b. 5.32 m/s Hint: Set these up using a Before & After chart
p. 219 4) a. 2.0 m/s right b. Total KE before = 382 J, Total KE after = 382 J
p. 199 1) 2500 2) a. 120 b. 95 c. 27 3) 46
p. 204 1) a. 2x 2) a. 31.0 3) a. 2.6 b. 130
p. 162 1) 1.50x10^7 J 2) 7.0x10^2 J
p. 163 1) -,+,- 2) neighbor, 2x 6) yes, no, yes
p. 148 5) a. 0.25 m/s^2, b. 18 m, c. 3.0 s
