Chapter 17 Answer Key: Gravitational Forces and Fields
Chapter 17: Gravitational Forces and Fields – Key
17.1 Gravitational Force
1. 9.82 N
2. 9.3 x 10-10 N
3. 5000 m or 5.00 km
4. 3.63 x 10-47 N
5. 5.52 x 1022 N
6. Doctor 1.2 x 10-8 N Mars 2.5 x 10-7 N
7. 1.91 x 1018 N
8. Earth-Moon: 2.02 x 1020 N, Sun-Moon: 4.39 x 1020 N
17.2 Gravitational Field Strength
1. 1.2 x 10-8 m/s2
2. 9.01 m/s2
3. 272 m/s2
4. 8.96 m/s2
5. Moon: 2.70 x 10-3 m/s2 Earth: 3.32 x 10-5 m/s2
6. 9.01 x 106 m from the Earth’s center or 2650 km above the surface
7. 2.45 m/s2 or 1/4 g’s 8. 1.25 x 106 m or 1250 km
9. 3.49 x 105 m
17.3 Gravitational Potential
1. ∆ V = – 5.97 x 104 J/kg
2. W = – 7.77 x 1010 J
3. ∆ V = – 2.82 x 106 J/kg
4. ∆ V = – 8.87 x 108 J/kg
17.4.1 Earth-Moon Gravity Neutral Point
1. Distance from the Earth = 3.46 x 108 m & distance from the Moon = 3.84 x 107 m.
