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Physics 3204 Sec 3.1: Gravitational & Electric Fields Name: / Tanush (E ) (Total = 43 Marks) Celestial Body Mass (kg) Equatorial Radius (m) Sun 1.99 x 101 6.96 x 10 Mercury 3.30 * 1071 2.44 x 106 venus 4.87 * 10 6.05 X 10 Earth 5.97 x 1074 6.38 x 10' Earth's Moon 7.35 * 10 1.74 * 106 Mars 6.42 x 10' 3.40 * 10 jupiter 1.90 * 10" 7.15 x 10' saturn 5.69 x 10* 6.03 x 10' uranus 8.68 x 10 2.56 x 10' Neptune 1.02 x 106 2.48 x 10' Part I: Place the letter of the correct answer in the space provided at the end. (15 marks) 1. Which represents the gravitational field around a spherical mass? (A) (B) (C) (D) 2. Two objects, each having a mass of 2.3 x 108 kg, are separated by a distance of 3.0 x 103 m. What is the gravitational force of attraction between them? (A) 1.7 x 10-9 N (B) 5.1 x 10 6 N (C) 3.9 x 10 - IN (D) 1.2 x 103 N 3. What is the separation distance between two 180 kg objects that experience a gravitational force of 2.00 x 10 -4N? (A) 0.011 m (B) 0.10 m (C) 9.6 m (D) 93 m 4. What is the gravitational force between the two masses in the system described by the data below? System Mass 1 (kg) Mass 2 (kg) Separation distance (m) Gravitational force (N) 4 2 2 8 8 ? (A) 0.25F (B) 0.50F (C) 2.OF (D) 4.OF 5. Over a period of one century the gravitational force between two asteroids is observed to decrease from 4.0 x 10 N to 1.0 x 10 N. Which of the statements below would not explain this change in gravitational force? (Hint: Proportionality) (A) Each asteroid lost half its mass due to celestial collisions (B) The asteroids moved four times farther apart (C) The asteroids move two times farther apart (D) Three-quarters of one of the asteroids split off and drifted away