X
R
Figure 2
6. At which of the points marked on the figure is the body back at its starting point?
A. R only
B. P and Q only
C. Q and S only
D. R and S only
E. P. Q. R and S
7. At which of the points does the body have the greatest speed?
A. R only
B. P and Q only
C. Q and S only
D. R and S only
E. P, Q, R and S