Identify the choice that best completes the statement or answers the question. W
ID: 2077921 • Letter: I
Question
Identify the choice that best completes the statement or answers the question. Which statement is true? a. Mass is a measure of resistance to acceleration. b. Weight is a measure of the amount of material in an object. c. The SI unit for weight is the kilogram. d. Mass measures the force of gravity acting on an object. The acceleration due to gravity on the Moon is about 1/6 that on the surface of Earth. It an astronaut has a mass of 90 kg on Earth, what is her mass on the Moon? a. 540 kg b. 90 kg c. 15 kg d. 0 kg Astronauts aboard a space station appear to be weightless Why is this? a. The force of gravity in space is zero. b. The force of gravity on an object in orbit is zero. c. The space station is in free-fall, and gravity is the only force acting on it. d. The space station moves at a constant speed while in orbit. Where do gravitational fields exist? a. They exist only near massive bodies like Earth or the Sun. b. They exist everywhere in the universe. c. They exist only where there are multiple masses, such as a solar system. d. They exist only within a few thousand kilometers of a planet like Earth. Two planets are far from any other bodies. If the distance between them is doubled, what happens to the gravitational force between them? a. It is doubled. b. It increases by a factor of 4. c. It is reduced by half. d. It decreases by a factor of 4. 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? a. It is equal to zero on the surface of Earth. b. It is cancelled by the gravitational field of Earth. c. It is much weaker than other forces in the classroom, such a weight and forces of friction. d. There are other students around you.Explanation / Answer
3) a) The force of gravity in space is zero
4) b) They exist only where there are multiple masses such as a solar system