PLZ ANSWER MY QUESTION ASAP Which option explains Cynthia’s exhaustion in the following scenario?

Cynthia is training for her first swimming race, and she is noticing the more she gains speed, the more tired she becomes.

The faster Cynthia swims, the more energy she must exert to overcome drag.

Cynthia uses all her energy to get to her fastest speed.

Cynthia needs to work on her stamina to make it through the race.

Cynthia’s arms and legs become heavier the longer the race goes on.

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2