A planet has two identical moons with identical mass. Moon 1 is in a circular orbit of radius r. Moon 2 is in a circular orbit of radius 2r. The magnitude of the gravitational force exerted by the planet on Moon 2 is
1.four times as large as the gravitational force exerted by the planet on Moon 1.
2.twice as large as the gravitational force exerted by the planet on Moon 1.
3.the same as the gravitational force exerted by the planet on Moon 1.
4.half as large as the gravitational force exerted by the planet on Moon 1.
5.one-fourth as large as the gravitational force exerted by the planet on Moon 1.
Question 2A ball is falling toward the ground. Which of the following statements are false?
a) The force that the ball exerts on the Earth is equal in magnitude to the force that the Earth exerts on the ball.
b) The ball undergoes the same acceleration as Earth.
c) The magnitude of the force the Earth exerts on the ball is greater than the magnitude of the force the ball exerts on the Earth.
1. Statements a and b are false.
2. Statements a, b, and c are all false.
3. Statements a and c are false.
4. Statements b and c are false.
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