Question 1 (1 point) The acceleration due to gravity on the Moon is about 1/6 that on the surface of Earth. If an astronaut has a mass of 90 kg on Earth, what is her mass on the Moon? Question 2 (1 point) A hammer and a feather are dropped from the same height on the moon, where there is no air. Neither will hit the ground first. Question 3 (1 point) Two planets are far from any other bodies. If the distance between them is doubled, what happens to the gravitational force between them? Q It is doubled. Q It increases by a factor of 4. Q It is reduced by half. 0 It decreases by a factor of 4. Question 4 (1 point) Which statement is true about the gravitational forces between two masses m1 and m2? Question 4 (1 point) Which statement is true about the gravitational forces between two masses m1 and m2? 0 They are equal and point in the same direction. 0 They form an "action and reaction" pair in accordance with Newton's Third Law of Motion. 0 They are not equal unless the two masses are equal. 0 Both act on the same body. Question 5 (1 point) The gravitational field strength at a point equals the magnitude of the force acting on a mass of 1 gram at that point. Question 6 (1 point) You are sitting in a classroom about 1 m away from another student with a similar mass. The gravitational force of attraction between you and the student is not apparent to you. Why? Q It is equal to zero on the surface of Earth. 0 It is cancelled by the gravitational field of Earth. 0 It is much weaker than other forces in the classroom, such a weight and forces of friction. Q There are other students around you