What is a chicken’s rate of acceleration that speeds up from 4 mph (mi/h) to a top speed of 9 mi/h in 0.5 hr?
2.5 mi/h/s
-2.5 mi/h/s
2.5 mi/h2
10 mi/h2
2.5 mi/h/s
-2.5 mi/h/s
2.5 mi/h2
10 mi/h2