Question

a car accelerates uniformaly from rest to 30m/s in 10s .it then travels at constant speed of 30m/s for 45s before coming to a stop uniform retardation in 5s calculate its acceleration in
first 10 s
next 45s
last 5 s

Answer 1

1) 3ms^-2
2) 0
3) 0.67ms^-2