A 65 kg human sprinter can accelerate from rest to 10 m/s in 2. During the same interval, a 33 kg greyhound can accelerate from rest to 20 m/s.

A 65 kg human sprinter can accelerate from rest to 10 m/s in 2.9 s. During the same interval, a 33 kg greyhound can accelerate from rest to 20 m/s. Compute (a) the change in kinetic energy and (b) the average power output for each.