Mrs. nogaki pushes one 10 kg box of books and one 20 kg box of books across a floor with equal force. what is true of the momentum of the boxes?
a. the first box has half the momentum of the second box
b. the first box has double the momentum of the second box
c. the first box has a quarter of the momentum of the second box
d. the first box has a quadruple the force of the second box
e. the boxes have the same momentum since the same force was used