posted by alicia .
Riding his bike, Dewayne can start from rest and get going at 12 m/s in 4 seconds. Beth can get going 16 m/s in 5 seconds. Who has a greater acceleration? How do you know?
Beth has a faster acceleration because you divide speed by time, and Beth is 16/5= 3.2, whereas Dewayne is 12/4= 3.