[单选题]
A sailboat of mass m is moving with a momentum p.)r3h6 4sx1fap 57 ) uq-tulzfl8dhv op How would you repres,soun fllng;4c) 6yfc8chn8msm19c 6ent its kinetic energy in terms of these m6f )g c86nsuylmc9snn1h; ,oc 4lfc8 two quantities?
A. $p^2/2m$
B. $\frac{1}{2} mp^2$
C. $mp$
D. $\frac{1}{2} mp$
