8. The moon moves around the earth. What kind of motion does the moon
demonstrate?
A. rectilinear
B. rolling
C. circular
D. periodic
9. The swing moves back and forth, up and down. What kind of motion has the
swing?
A. periodic B. rectilinear C. rolling
D. circular
10. Which of the following affects the motion of an object?
A. push
B. pull
C. friction
D. all of the above
11. A force is described as
A. a push only
C. a push or a pull
B. a pull only
D. none of the above​