If a person takes 22 seconds to swim in a straight line and the end of the pool distance of 28 m what is the swimmers velocity

Iagree c would be the answer

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared. 

330 wpu is be the right temperature

C. hope this . : )