Question 1 (1 point) Saved Consider two planets, A and B. Planet A has half the mass and half the radius of planet B. The ratio of gA : gB would be: A) 2:1 O B) 1 :1 OC) 4:1 ( D) 1:4 O E) 1:2Which of the following graphs best depicts the relationship between the gravitational force, F, that two masses exert on one another and the distance, d, which separates their centres of mass? E Force vs Distance LCLLQ Question 3 (1 point) If Earth's mass was four times what it is presently, what would its radius have to be (comparably) so that the gravitational field strength at its surface would remain 9.8 N/kg? O A) twice as large O 3) four times larger 0 C) onehalf as large O D) one-quarter as large O E) the same size Question 4 (1 point) Which of the following statements concerning gravitational fields is true? 0 A) The gravitational field strength of an object is one-quarter as great at twice the distance from the object's centre. 0 B) The strength of an object's gravitational field is inversely proportional to I 5 mass. 0 0 Only very massive objects have gravitational fields. 0 D) The strength of an object's gravitational field is inversely proportional to the square of its mass. 0 E) The strength of an object's gravitational field is inversely proportional to the distance from the object's centre. Question 5 (1 point) Consider two planets, A and B. Planet A has twice the mass and twice the radius of planet B. The ratio of gA : gB would be: (A) 2:1 O B) 1:1 (c) 4 :1 ( D) 1:4 O E) 1:2Question 6 (1 point) The gravitational field strength of Earth 0 A) has a value of 9.8 N/kg [down] at all locations on its surface. O B) is smallest at the peak of Mount Everest, the highest elevation. O C) is greater at the equator than at the poles. O D) is largest at the deepest spot on the ocean floor. O E) is largest at the poles. Question 7 (1 point) What would the gravitational field strength be on a planet with half Earth's mass and half its radius? 0 A) 9.3 N/kg O B) 4.9 N/kg O C) 19.6 N/kg O D) 73.4 N/kg O E) 39.2 N/kg Question 8 (1 point) What would the gravitational field strength be on a planet with twice Earth's mass and twice its radius? O A) 39.2 N/kg O B) 4.9 N/kg O C) 19.6 N/kg O D) 73.4 N/kg O E) 9.3 N/kg Question 9 (1 point) According to Newton's Law of Universal Gravitation, the gravitational force of attraction between two objects would be 0 A) the same regardless of where they are. 0 3) twice as strong if they're moved half as far apart. 0 0 four times as strong if they're moved twice as far apart. 0 D) one quarter as strong if they're moved twice as far apart. 0 E) twice as strong if they're moved twice as far apart. Question 10 (1 point) The value of "g" at the surface of Mars is 3.7 N/kg. How much would a 60.0 kg person weigh at an altitude above the Martian surface equivalent to the planet's radius? A) 2.2 x 102 N ( B ) 56 N O C) 28 N ( D) 1.6 x 102 N O E) 1.1 x 102 NQuestion 11 (1 point) Your "weight" is properly defined as O A) the amount of material of which you are composed. O B) none of the above. 0 C) the gravitational force that the Earth exerts on you. O D) the force you exert on a set of bathroom scales. 0 E) the gravitational force you exert on Earth. Question 12 (1 point) If you weighed 112 N on the Moon where g = 1.6 N/kg, how much would you weigh on Earth? 0 A) 6.9 x 103 N O B) 1.7 x104 N O C) 6.9 x 102 N O D) 1.1 x 102 N O E) 1.1 x 104 N Question 13 (1 point) How much would a 60 kg person weigh on the Moon where the gravitational field strength has a magnitude of 1.6 N/kg? A) 98 kg ( B) 60 kg O C) 96 N ( D) 98 N O E) 96 kgQuestion 14 (1 point) Which of the following statements concerning gravitational fields is true? 0 A) The strength of an object's gravitational field varies inversely as the square of the distance to its centre. 0 B) An object's size alone dictates the strength of its gravitational field. 0 C) An object's mass alone dictates the strength of the gravitational field at its surface. 0 D) The moon's gravitational field is much smaller than Earth's because the moon's radius is so much smaller than Earth's. O E) The strength of an object's gravitational field varies directly as the square of its mass. Question 15 (1 point) If Earth was twice its present mass, but its size was not changed, you would weigh O A) four times as much. 0 3) twice as much. 0 C) the same amount. 0 D) half as much. 0 E) one-quarter as much. Question 16 (1 point) If Earth's mass was four times what it is presently, what would its radius have to be (comparably) so that the gravitational field strength at its surface would remain 9.8 N/kg? O A) one-half as large 0 B) twice as large 0 C) the same size 0 D) four times larger 0 E) one-quarter as large Question 17 (1 point) If you were sitting half as far from your nearest classmate, the gravitational force of attraction between the two of you would be four times as strong. Question 18 (1 point) If the moon was twice the distance from Earth as it is now, the gravitational force of attraction between the two bodies would be half as great