1. The period of a satellite circling planet Nutron is observed to be 95 s when it is in a circular orbit with a radius of 7.0 x 106 m. What is the mass of planet Nutron? (G = 6.67 x N·m2/kg2) Select the correct answer.
2.2 x 1028 kg
2.5 x 1028 kg
1.3 x 1028 kg
1.0 x 1028 kg
3.7 x 1028 kg 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

2. A satellite circles planet Roton every 2
A satellite circles planet Roton every 2.9 h in an orbit having a radius of 1.5 x 107m. If the radius of Roton is 4.5 x 106m. what is the magnitude of the free-fall acceleration on the surface of Roton? Select the correct answer.
60 m/s2
73 m/s2
27 m/s2
32 m/s2
35 m/s2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

3. A 50-kg satellite circles planet Cruton every 6
A 50-kg satellite circles planet Cruton every 6.6 h in an orbit with a radius of 11 x 106m. What is the magnitude of the gravitational force on the satellite by planet Cruton? Select the correct answer.
38 N
51 N
77 N
58 N
13 N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

4. the smaller gravitational mass the larger gravitational mass
Two identical planets orbit a star in concentric circular orbits in the star's equatorial plane. Of the two, the planet that is farther from the star must have _____ Select the correct answer.
the smaller period
the greater period
the smaller gravitational mass
the larger gravitational mass
the larger universal gravitational constant 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

5. What is the kinetic energy of a 220-kg satellite as it follows a circular orbit of radius 8.0 x 106 m around the Earth? (Mass of Earth = 6.0 x 1024 kg. G = 6.7 x N·m2/kg2) Select the correct answer.
5.5 x 109J J J
3.5 x 1010J
3.0 x 1010J 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

6. 2.9 km/s 2.5 km/s 1.7 km/s 4.5 km/s 4.9 km/s
What is the escape speed from a planet of mass M and radius R if M = 2.2 x 1023 kg and R = 3.4 x 106 m? (G = 6.7 x N·m2/kg2) Select the correct answer.
2.9 km/s
2.5 km/s
1.7 km/s
4.5 km/s
4.9 km/s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50