Mattie starts at one end of the pool and David at the other. They both start swimming
at the same time. Mattie swims breast stroke at 0.5 m/s and David swims butterfly at
0.75 m/s.
e. After four seconds, what is David’s displacement from his end of the
pool? [1]
f. After four seconds what is Mattie’s displacement from David’s end of the
pool? [2]
g. How far has Mattie swim when she meets David coming the other way?