Two books are located 1 m above the surface of the earth. the first has a mass of 2 kg; the second has a mass of 1 kg. which statement about the pull of earth's gravity is true?
a. the force of earth's gravity on the 1-kg book is stronger than the force of earth's gravity on the 2-kg book.
b. the force of earth's gravity on the 2-kg book is stronger than the force of earth's gravity on the 1-kg book.
c. the force of earth's gravity is the same on both books, because when they're dropped, they'll both accelerate at 9.8 m/s2.
d. the force of earth's gravity is the same on both books, because the two books are both 1.0 m above the ground.