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Kinematics
In Problems Section at end of chapter: #38, 41, 42, 44, 58, 60, 61, 69, 70, 73, 74
Answers: #38: a = - 4.4x10^2 m/s^2 #41: 31 m/s #42: #44: 14.4 s #58: (a) 17.1 m/s (b) 0.602 s, 4.09 s #60: (a) 88 m/s (b) 27 s (c) 1590 m (d) 36 s (e) -1.8 x 10^2 m/s^2 (f) 54 s
#61: 1.8 m #69: 6 h(earth) #70: (a) -1.5x10^2 m/s^2 #73: net should be loosened #74 (a) negative (b) speeding up (c) negative (d) positive (e) speeding up
(f) positive (g) not moving, zero.
Vectors
In Problems Section at end of chapter: #15, 16, 62, 64, 66, 67
Answers: #15: 94.5 11.8 degrees belows x axis #16: D(x) = H(x) = -2454 m, D(y) = 3867 m D(z) = V = 2450 m D = 5194 m #62: a) 490 km/hr &.45 degrees east of south
b) 12.7 km #64: 2.26 m/s 11 degrees above the water #66: 0.97 m/s #67 a) 60m b) 75s
Projectiles
In Problems Section at end of chapter: #33, 34, 38, 40, 44, 45, 75, 81
Answers: #33: 22m #34: #38: 9.15 m/s 0.78m #40: a) 10.4 s b) 540 m c) 51.9 m/s d) 81.5 m/s e) 50.4 degrees below the horizontal #44: a) 53m b) 60m c) 35 m/s at 77 degrees belows the horizontal #45: a) 3.42 m/s, 47.5 above the hoprizontal b) 5.32m above the water c) 10.5 m/s, 77 degrees below the horizontal
#75: 7.0 m/s #81 1.6 m/s^2
Newton's Laws
In Problems Section at end of chapter:
Newton's Laws: Ramps: #40, 41, Coupled: 47 Coupled Ramp: 66, 68
Elevator: 70
Answers: #40:(a) 3.67m/s^2 (b) 9.39 m/s #41: (a) 2.2 m up the plane (b) 2.2 s
#47: (a) a = M2g/ (m1+m2) (b) F(T) = m1m2g / (m1+m2)
#66: (a) a = (m2-m1sinØ)g / (m1+m2) #68: (a) a = m1sinØ1 - m2sinØ2)g / (m1+m2) #70: (a) 75.0 kg (735N) (b) 75.0 kg (735N) (c) 75.0 kg (735N) (d) 98.0 kg (960 N) (e) 52.0 kg (510 N)
In Problems Section at end of chapter:
More Newton's Laws: Ramps: #17, 18, 19, 26, 27 in Chapter 5
Answers: #17: (a) 1.4 m/s2 (b) 1.4 m/s2 (c) 2.1 x 10^2 N #18: (a) 2.1 m/s^2 (b) 6.3 m/s #19: (a) 0.86 m up the plane 1.5 s(b) #26: Bonnie's #27: (a) 2.0 m/s^2 (b) 5.4 m/s^2 up the plane
Centripetal Force:
In Problems Section at end of chapter: #38, 39, 40, 41, 42, 44, 47
Ans: 38) 3.2x 10^4 rpm 39) Yes, V(top, min) = (gR)^1/2 40) 8.9 m/s 41) 0.34 42) 69m 44) 6.1 m/s
47) a: F(Ncar) = 5.8x10^3 N B: F(Ndriver) = 4.1x10^2 N C: v = 31m/s
Gravity
p172 # 1,4,9,10,12,14,16,18, 20,24
Ans: 1) 12 yrs 4) 23 yrs 9) 8.0 x 10^-10 N 10) 6.5 x 10^-8 N
12) 9.01 x 10^-31 kg 14) a: 6.0 x 10^24 kg b: 5.5 kg/m^3
16) 100 N 18) 5.6 x10^26 kg 20) a: 3.07 x 10^3 m/s b: 24.0 h 24) 2.65 x 10^3 km
Energy
Momentum
Rotation
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