ANSWER KEY

Chapter I: 1-D Motion: Displacement, Velocity & Acceleration Chapter II: Vectors & their Operations Chapter III: Forces & Newton's Laws of Motion Chapter IV: Work, Energy & Power Chapter V: Circular Motion & Gravitation Chapter VI: Heat & Thermodynamics Chapter VII: Light, Reflection & Refraction Chapter VIII: Electric Forces, Electricity & Electrical Circuits
  1. V(avg) = 80.1 mph EAST

  2. t = 1.12 mins.

  3. ∆x = -40 m

  4. 12 m

  5. 1.5 secs

  6. ∆x = 825 m EAST

  7. ∆x = 120 m

  1. Vy = 54 km/h &
    Vx = 78 km/h

  2. Vx = 5.56 m/s

  1. Fx = 60.6 N &
    Fy = 35.0 N

  2. 557 N at 35.7° west of north

  3. a = 0.73 m/s^2 to the right

  4. a = 0.12 m/s^2 to the right

  5. μs = 0.32

  1. Vt = 19.7 m/s

  2. m = 1110 kg

  3. r = 3.00 × 10^–1 m

  4. Vt = 7.12 × 10^3 m/s

  1. W = 130 J

  2. Vt = 1.60 × 10^2 m/s
    No, the speed would be very fast for a table-tennis ball

  3. Vf = 7.67 m/s

  4. P = 2.8 × 10^3
    W = 2.8 kW

  1. 10°C & 283.2° K

  2. t(metal) = 81°C

  3. 1.76 × 10^3 J

  4. W = 3.0 × 10^2 J

  5. Q = -21J

  6. eff = 0.250

  1. 14 cm

  2. 6.65 cm

  3. 2.04 x 10^3 km

  4. 70°

  5. 3.06 cm

  6. 2.4 x 10^15 Hz

  7. λ1 = 5.6 × 10^2 m
    λ2 = 1.8 × 10^2 m

  8. q = 15 cm & M = -0.05

  9. θr = 19.2°

  10. di = 20.0 cm &
    M = -1.00
    Description: Real, inverted image

  1. 4.8 × 10^-6 C

  2. 1.66 × 10^5 N/C
    81.1° above the positive x-axis

  3. F(electric) = 8.2 × 10^-8 N
    Fg = 3.6 × 10^-47 N

  4. E (total) = 2.71 x 10^5 N/C
    Direction of E vector = 66.6°

  5. q = 1.6 × 10^-19 C
    ∆V = - 4.3 V

  6. C = 3.0 × 10^-6
    F = 3.0 µF
    PE (electric) = 2.2 × 10^-4 J

  7. 2 sec

  8. R = 10.9 Ω

  9. I = 6.32 A

  10. Req = 18 Ω
    I(total) = 0.5 A

  11. Req = 12.7 Ω

  12. Req = 0.917 Ω
    I(total) = 9.8 A