According to Newton's theory of gravity, why does the Moon have a much lower acceleration than a falling object on Earth?
a. Because the Moon is so heavy.
b. Because the Moon is close to Earth's center.
c. Because the Moon is lighter than Earth.
d. Because the Moon is farther away from Earth's center than the object falling at Earth's surface.
e. Because the Moon has its own gravitational field.
Question 2
Which force did Kepler believe moved the planets around the Sun?
a. electricity
b. inertia
c. light from the Sun
d. gravity
e. magnetism